ACAEBT Wireless Around Ear Headphones

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Product Information

Specifications

• Brand: Accentum
• Model: ACAEBT
• Type: Wireless around-ear headphones
• Manufacturer: Sonova Consumer Hearing GmbH
• Address: Am Labor 1, 30900 Wedemark, Germany
• Website: www.sennheiser-hearing.com
• Version: 11/23 A02

Product Usage Instructions

Important Safety Instructions

1. Read the instruction manual carefully before using the
product.

2. Do not use the product if it is defective or makes loud,
unusual noises.

3. Use the product in environments where Bluetooth wireless
transmission is permitted.

Preventing Damage to Health and Accidents

– Protect your hearing by avoiding high volume levels for
extended periods.

– Maintain a safe distance between the product containing
magnets and pacemakers or implants.

– Keep the product away from children and pets to prevent
accidents.

– Avoid using the product in environments that require your
special attention.

Preventing Damage to the Product and Malfunctions

– Do not cover the microphone openings for noise cancellation to
ensure proper function.

– Use only recommended attachments and accessories.

– Clean the product with a soft, dry cloth only.

Safety Instructions for Lithium Rechargeable Batteries

– Use recommended rechargeable batteries and chargers.

– Switch off battery-powered products after use.

– Charge batteries regularly if not in use for extended
periods.

– Avoid prolonged skin contact with charging components.

Notes on Data Collection and Processing

– Product stores individual settings for operation but does not
transfer data to the manufacturer.

FAQ

If a Problem Occurs…

For troubleshooting, refer to the instruction manual or contact
customer support at Sonova Consumer Hearing GmbH.

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ACCENTUM
Wireless around-ear headphones Model: ACAEBT
Instruction manual Use the search function, the navigation (left) or the following links: Start “Product overview” “Getting started” “Using the headphones” “FAQ/If a problem occurs …” “Specifications” Sonova Consumer Hearing GmbH Am Labor 1 30900 Wedemark Germany www.sennheiser-hearing.com Version: 11/23 A02

Important safety instructions

Important safety instructions
Read this instruction manual carefully and completely before using the product.
Always include this instruction manual when passing the product on to third parties.
Do not use the product if it is obviously defective or makes loud, unusual (whistling or beeping) noise.
Only use the product in environments where Bluetooth wireless transmission is permitted.
Preventing damage to health and accidents
Protect your hearing from high volume levels. Permanent hearing damage may occur when headphones are used at high volume levels for long periods of time. Headphones of the Sennheiser brand sound exceptionally good even at low and medium volume levels.
The product generates stronger permanent magnetic fields that could cause interference with cardiac pacemakers, implanted defibrillators (ICDs) and other implants. Always maintain a distance of at least 3.94″/10 cm between the product component containing the magnet and the cardiac pacemaker, implanted defibrillator, or other implant.
Keep the product, accessories and packaging parts out of reach of children and pets to prevent accidents. Swallowing and choking hazard.
Do not use the product in an environment that requires your special attention (e.g. in traffic). Especially the product’s active noise cancellation can make ambient sounds inaudible or drastically change the perception of acoustic warning signals.
Preventing damage to the product and malfunctions
Always keep the product dry and do not expose it to extreme temperatures (hairdryer, heater, extended exposure to sunlight, etc.) to avoid corrosion or deformation. The normal operating temperature is from 0 °C to 40 °C/32 °F to 104 °F.
To avoid loud, unusual (whistling or beeping) noise and to ensure proper noise cancellation, do not cover the microphone openings of the active noise cancellation circuitry located on the outside of the ear cups.
Use only attachments/accessories/spare parts supplied or recommended by Sonova Consumer Hearing.
Clean the product only with a soft, dry cloth.

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Important safety instructions
Safety instructions for Lithium rechargeable batteries
WARNING If abused or misused, rechargeable batteries may leak. In extreme cases, they may even present a risk of: · explosion · heat and fire development · smoke and/or gas development · damage to health and/or the environment
Only use rechargeable batteries and chargers recommended by Sonova Consumer Hearing.
Do not leave the product / rechargeable batteries unattended while charging. Only charge the product / rechargeable batteries at ambient temperatures between 10 °C and 40 °C/50 °F and 104 °F and do not charge them near easily flammable objects. Do not charge the product / rechargeable batteries in a damp environment. Make sure that the charging socket is free from moisture and contamination. Do not heat the product / rechargeable batteries above 60 °C/140 °F. Avoid exposure to sunlight and do not throw the product / rechargeable batteries into fire.
Switch rechargeable battery-powered products off after use.
When not using the product / rechargeable batteries for extended periods of time, charge them regularly (about every three months). Avoid prolonged skin contact with the product, rechargeable battery, charger or charging cable when connected to a power source. These components can heat up during charging and cause skin irritation. Dispose of defective products with built-in rechargeable batteries at special collection points or return them to your specialist dealer to facilitate recycling.
Notes on data collection and processing and on firmware updates This product stores individual settings such as the volume, the sound profiles and the Bluetooth connection data of paired devices. This data is required for the operation of the product and is not transferred to Sonova Consumer Hearing GmbH or companies commissioned by Sonova Consumer Hearing GmbH and is not processed.
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Important safety instructions

Using the “Sennheiser Smart Control” app, you can update the firmware of the product for free via an Internet connection. If the device on which the app is installed is connected to the Internet, the following data is automatically transferred to and processed by Sonova Consumer Hearing servers in order to provide and transfer suitable firmware updates: hardware identifier, hardware revision number, firmware version of the product, operating system type (Android, iOS) and version, version of the app. The data will only be used as specified and will not be stored permanently.
If you do not want this data to be transferred and processed, do not connect to the Internet.
Notes on the use of headphones in damp environments
Headphones are an everyday companion. When using the headphones on the go, they may be exposed to moisture. For example, rain, air humidity or even sweat may come into contact with the headphones.
To ensure proper, safe and long-lasting performance:
Avoid contact with moisture and always keep headphones dry. Do not use headphones in the rain/snow or in the shower. Do not use headphones in swimming pool, sauna or during other
activities with water/high air humidity (e.g. washing dishes).
Do not store headphones in airtight containers/bags together with damp objects (e.g. damp laundry) or objects that can cause condensation moisture (e.g. cold water bottles).
Never charge damp headphones. Make sure that the charging socket is free from moisture and contamination.
If your headphones have become damp or wet:
Dry headphones completely with a dry cloth. Allow headphones to dry at room temperature for at least
24 hours before using and charging them again.
Do not continue to use the product if it is obviously defective.

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Important safety instructions Intended use/Liability These headphones have been designed as an accessory for Bluetooth compliant devices. They are intended for wireless audio communication such as music playback and phone calls via Bluetooth wireless technology. It is considered improper use when the product is used for any application not named in the corresponding product documentation. Sonova Consumer Hearing GmbH does not accept liability for damage arising from misuse or improper use of this product and its attachments/accessories. Sonova Consumer Hearing GmbH is not liable for damages to USB devices that are not consistent with the USB specifications. Sonova Consumer Hearing GmbH is not liable for damages resulting from the loss of connection due to flat or overaged rechargeable batteries or exceeding the Bluetooth transmission range. Before putting into operation, please observe the respective country-specific regulations.
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Package contents

Package contents
ACCENTUM around-ear headphones Model: ACAEBT
USB cable with USB-C and USB-A connector, length approx. 1.2 m
Quick guide
Safety guide
Online you can find: · this detailed instruction manual and additional information
(www.sennheiser-hearing.com/download) · the Sennheiser Smart Control app for configuring the head-
phones and for additional functions (www.sennheiser-hearing.com/smartcontrol) · a list of accessories on the ACCENTUM product page at www.sennheiser- hearing.com/accentum to purchase online or contact your local Sonova Consumer Hearing partner: www.sennheiser-hearing.com/service-support

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Product overview
ACCENTUM Model: ACAEBT
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Product overview
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3 4

3

6

5

4

R

A

A

7

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0

B

B

Ear pads Headband, steplessly adjustable Ear cups Speech microphones (2 pcs.) for phone calls LED display USB-C socket for charging, calling, streaming via PC/Mac
Volume + button Music and voice control button Volume – button

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Product overview

Main button · On/off button · Voice assistant button · Pairing button: pressing for 5 seconds activates the
Bluetooth pairing mode Marking for the right ear (R) and for the left ear (L) (inside the ear cups) Microphones for the active noise cancellation ANC; 2x directed outward, 2x directed inward (not visible)
Overview of the controls Switch-on of the headphones · Press the main button for 3 seconds
Hold 3s

Overview of the LED display During operation

LED
5 s 3x
3x

white lights up for 5 seconds
white flashes 3x
white-red flashes
red flashes 3x

Meaning/headphones…
… switch on
… are connected to a device via Bluetooth … are in Bluetooth pairing mode
… switch off

During phone calls

LED
10x

white flashes 10x repeatedly

Meaning Incoming call

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Product overview

During charging

LED

Meaning

flashes red Battery charge is 0 % to 20 %.

flashes yellow Battery charge is 20 % to 90 %.

flashes green Battery charge is 90 % to 100 %.

5min

lights up green for 5 minutes

When the rechargeable battery is 100% charged, the LED lights up for 5 minutes and then goes off.

If the LED display does not light up:
· Clean the charging socket (> 34).
· Charge the rechargeable battery until the LED display lights up again (at least 30 minutes) (> 13). If the rechargeable battery is completely discharged, it may take several minutes for the LED display to indicate the charging process.

Overview of sound signals and voice prompts The headphones output voice prompts and sound signals in case of various events.
Via the Smart Control app, you can adjust settings for the voice prompts and sound signals (> 31).

Voice prompt

Meaning/headphones…

Establishing a Bluetooth connection

“Connected”

…are connected via Bluetooth.

“No connection”

… have lost the Bluetooth connection to a paired device.

“Pairing successful”

… have successfully completed Bluetooth pairing.

“Pairing failed”

… have not successfully completed Bluetooth pairing.

Information on battery status and volume

“Recharge headset”

… has an empty rechargeable battery. Charge the rechargeable battery (> 13).

“More than xx % battery left”

… indicates the remaining battery charge in percent.

“Volume min”

… has reached the minimum volume setting.

“Volume max”

… has reached the maximum volume setting.

“Mute on”

… mutes the microphone.

“Mute off”

… activates the microphone again.

You hear short sound signals when the headphones · are switched on or off, · are in pairing mode (melody), · detect devices in the pairing list,

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Product overview

· cancel the pairing process,
· receive commands via one of the buttons (increasing the volume, starting/pausing music playback, accepting/holding/rejecting calls, adjusting the ANC function or Transparency Mode),
· receive an incoming call (ring tone).

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Getting started
Getting started
1. Charging the rechargeable battery
The headphones’ rechargeable battery is not fully charged upon delivery. Before using the headphones for the first time, charge the
rechargeable battery for a complete charging cycle without interruption (> 13).

USB-C

USB-A

2. Connecting the headphones to a Bluetooth device
Connect the headphones to your smartphone via Bluetooth (> 14).

ON

ACCENTUM

……

5s

Connected

3. Smart Control app for your smartphone
The Sennheiser Smart Control app allows you to use all functions and settings of the headphones and to e.g. adjust the sound to your liking using the equalizer (> 18).

ACCENTUM

“Sennheiser Smart Control”

4. Putting the headphones on and adjusting the headband
For good sound quality and best possible wearing comfort, the headband can be adjusted to properly fit your head (> 20).

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Using the headphones

Using the headphones
Information on the rechargeable battery and the charging process
The headphones have a built-in rechargeable battery. A complete charging cycle takes approx. 3 hours. The charging time can vary depending on the power source used and the ambient temperature. Before using the headphones for the first time, charge the rechargeable battery for a complete charging cycle without interruption.
When the headphones are being charged, the LED display lights up (>8). Once the headphones are 100% charged, the LED lights up green for 5 minutes and then goes off. When the battery charge drops to a low level, the voice prompt “Recharge headset” asks you to recharge the headphones. If the headphones are not charged, the voice prompt will be repeated every 10 minutes until the headphones switch off.
Sonova Consumer Hearing recommends using the supplied USB cable and a compatible standard USB power supply for charging the headphones.
While the headphones are being charged, you can still listen to music or make phone calls. In this case, however, the charging time may be longer.
At the end of its operational lifetime, this product with its built-in rechargeable battery must be disposed of separately from normal household waste. You can find more information here: > 39.

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Using the headphones
Charging the headphones’ rechargeable battery

R
USB-C

USB-A

1. Make sure that the charging socket is free from moisture and contamination. Connect the USB-C connector of the charging cable to the USB socket of the headphones.
2. Connect the USB-A connector to a corresponding socket of a USB power source (to be ordered separately). Make sure that the USB power source is connected to the power supply system. The charging process of the headphones begins. The LED display indicates the charge status.

LED
5min

flashes red

Meaning Battery charge is 0 % to 20 %.

flashes yellow Battery charge is 20 % to 90 %.

flashes green Battery charge is 90 % to 100 %.

lights up green When the rechargeable battery is for 5 minutes 100% charged, the LED lights up for
5 minutes and then goes off.

If the LED display does not light up:
Clean the charging socket (> 34). Charge the rechargeable battery until the LED display lights up
again (at least 30 minutes) (> 13). If the rechargeable battery is completely discharged, it may take several minutes for the LED display to indicate the charging process.
You can speed up the charging process by charging the headphones when they are switched off.

If you disconnect the USB connection during or after charging, you will hear a voice prompt informing you of the remaining battery life.
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Using the headphones

Connecting the headphones to a Bluetooth device
To be able to use the Bluetooth connection, you must register both devices (headphones and e.g. smartphone) once. This process is called pairing.
If operation differs from the steps mentioned, also refer to the instruction manual of the Bluetooth device you are using.
If you switch on the headphones for the first time (the pairing list is empty), they automatically switch to pairing mode.

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Using the headphones
Information on the Bluetooth wireless connection
The headphones are compliant with Bluetooth 5.2. If your audio source supports one of the following high-resolution audio encoding methods, music is automatically played in high audio quality: aptXTM HD or AAC. Otherwise the headphones will play your music in normal audio quality (SBC). Paired devices establish the Bluetooth wireless connection immediately after switch-on and are ready for use. On switch-on, the headphones automatically try to connect to the last two connected Bluetooth devices. The headphones can save the connection profiles of up to six Bluetooth devices with which they have been paired. Audio playback is only possible from one device at a time. If you pair the headphones with the seventh Bluetooth device, the saved connection profile of the least used Bluetooth device will be overwritten. If you want to re- establish a connection with the overwritten Bluetooth device, you have to pair the headphones again.
1
2 6

5

3

4

Paired and connected Bluetooth device Paired Bluetooth device (currently not connected)

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Using the headphones

Pairing the headphones with a Bluetooth device
If you switch on the headphones for the first time (the pairing list is empty), they automatically switch to pairing mode.
1. Switch the headphones off and place them close to the Bluetooth device (max. 20 cm).
2. Press the main button for 3 seconds. The headphones are switched on and you hear a sound signal. The LED lights up white for 5 seconds.
3. Press the main button for 5 seconds. The headphones switch to pairing mode. The LED flashes alternately white and red.
4. Activate Bluetooth on your Bluetooth device.
5. Via the menu of your Bluetooth device, start the search for new Bluetooth devices. All active Bluetooth devices in the proximity of your Bluetooth device are displayed.
By default, the name of the headphones is “ACCENTUM”. You can individually adjust the name in the Smart Control app (> 18).
6. From the list of found Bluetooth devices, select “ACCENTUM”. If necessary, enter the default pin code “0000”.
7. If pairing was successful, you hear the voice prompts “Pairing successful” and “Connected” one after the other. The LED flashes white 3x.

ON

5s

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ACCENTUM ……

3x
If no connection is established within 2 minutes, pairing mode is terminated and the headphones switch to standby mode. If necessary, repeat the steps described above.

Using the headphones
Switching the connection to paired Bluetooth devices/”Connections”
To selectively switch the audio connection to paired Bluetooth devices using the “Connections” function, you require the Smart Control app (> 18). In the Smart Control app, tap “Connections”.
The list of Bluetooth devices paired with the headphones appears. From the list, select the paired device to which you want to connect the headphones. Make sure that the desired device is switched on and Bluetooth is activated. The Bluetooth audio connection between the desired Bluetooth device and the headphones is established. The app connection between the device with the Smart Control app installed and the headphones remains active (only Bluetooth Low Energy for communication between app and headphones, the device name is highlighted in bold).
The “Connections” function also allows you to selectively delete pairing information of devices without resetting the headphones to the factory default settings.
Disconnecting the headphones from a Bluetooth device
Via the menu of your Bluetooth device, disconnect the connection to the headphones. The headphones are disconnected from the Bluetooth device. You hear the voice prompt “No connection”. The headphones switch to standby mode. To delete the Bluetooth pairing list of the headphones: > 37.
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Using the headphones

Installing the Smart Control app
To make full use of all the settings and functions of the headphones, you need to have the free Sennheiser Smart Control app installed on your smartphone.
Download the app from the Apple App Store or Google Play and install it on your smartphone. Alternatively, you can use your smartphone to scan the following QR code or to call up the following Internet site:
www.sennheiser-hearing.com/smartcontrol
· Google Play Store: click
· Apple App Store: click

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Connect your smartphone to the headphones via Bluetooth (> 14). Start the Smart Control app. Follow the instructions in the app.
The Smart Control app recognizes the headphones and activates all available settings and functions.
Switching the headphones on
WARNING Danger due to high volume levels! Listening at high volume levels can lead to permanent hearing defects. Before putting the headphones on, adjust the volume
to a low level (> 21). Do not continuously expose yourself to high volume
levels. Press the main button for 3 seconds.
The LED lights up white for 5 seconds. You hear a sound signal. If Bluetooth is activated on the headphones and a paired device is available, the LED flashes white 3x and you hear the voice prompt “Connected”. If Bluetooth is deactivated on the headphones (> 31), you only year a sound signal.
Hold
3s
5s

Using the headphones Make sure that Bluetooth is already activated on your Bluetooth device when switching on the headphones. If Bluetooth is activated and the headphones cannot find a paired Bluetooth device within a few minutes, you hear the voice prompt “No connection”. The LED flashes red 3x. The headphones switch to standby mode.
Switching the headphones off
Press the main button for 3 seconds. You hear a sound signal. The LED flashes red 3x. The headphones switch off. 1. 3s
3x
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Using the headphones

Putting the headphones on and adjusting the headband
For good sound quality, the best possible noise cancellation and the best possible wearing comfort, the headband can be adjusted to properly fit your head.
Wear the headphones so that the headband runs over the top of your head. The markings for the right side (R) and for the left side (L) can be found on the inside of the ear cups.
Move the ear cups up or down the headband slider until: ­ your ears are comfortably covered by the ear pads, ­ you feel even, gentle pressure around your ears, ­ a snug fit of the headband on the head is ensured. For optimal sound quality, the ear pads must completely surround your ears.

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Using the headphones

Retrieving information on the battery charge status
When the headphones are connected to your Bluetooth device, the battery charge status can be displayed on the screen of your smartphone (depending on the device and operating system used).
The Smart Control app also displays the battery charge status.
On the headphones, you can retrieve information on the battery charge level via the voice prompts (also possible while listening to music or talking on the phone, as long as you have the headphones on):
Press the music and call control button for 3 seconds. You hear a voice prompt informing you of the remaining battery life. The LED flashes/lights up depending on the battery life of the headphones.

Voice prompt
“Recharge headset”
“More than xx % battery left”

Meaning
The rechargeable battery is empty. Charge the rechargeable battery (> 13).
The remaining battery charge is displayed as a percentage.

“More than 40% battery left”

3sec

Adjusting the volume
WARNING Danger due to high volume levels! Listening at high volume levels can lead to permanent hearing defects. Toggling between the audio sources may cause enormous volume jumps that can permanently damage your hearing. Before putting the headphones on and before tog-
gling between audio sources, adjust the volume to a low level. Do not continuously expose yourself to high volume levels.
You can adjust the playback volume for music and for phone calls. If you are playing music, are on a call or if the headphones are in
idle mode (i.e. you are neither playing music nor are on a call): Press the volume + or the volume ­ button to increase or decrease the volume for music, voice prompts and sound signals. When the maximum or minimum volume is reached, you hear the voice prompt “Volume max” or “Volume min”.
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Using the headphones

Depending on the length of the button press, you adjust the volume in smaller increments (short button press) or larger increments (long button press).
When switching the headphones off, very high volume levels are automatically reset to a moderate level to protect your hearing when you switch the headphones on again.

R

R

You can also adjust the volume using the connected Bluetooth device.
If you have activated the voice assistant (> 30) and then change the volume of the headphones, the volume of the voice assistant is adjusted accordingly and saved permanently.

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Using the headphones
Information on active noise cancellation ANC
Due to its closed design, the headphones offer effective passive isolation from ambient noise. In addition, the headphones have an active noise cancellation (ANC) function, which allows you to reduce ambient noise to a minimum. Even with ANC, the sound quality of your headphones is always at its best. If you want to create a quiet space in a noisy environment, you can simply use the headphones ­ without connected cables and without Bluetooth devices ­ as noise protection by using ANC (> 25). Notes on active noise cancellation · Continuous and low-frequency noise, such as motor or fan noise,
is particularly well suppressed. · Speech or high-frequency noise is significantly reduced, but can
remain perceptible. · In very quiet environments, slight noise may occur. · If unusual (whistling or beeping) noise occurs, take the head-
phones off and put them on again. Make sure that the ear cups properly fit around your ears. · To avoid loud, unusual (whistling or beeping) noise and to ensure proper noise cancellation, do not cover the microphone openings of the active noise cancellation circuitry located on the outside of the ear cups.
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Using the headphones

Information on the Transparency Mode ­ Hearing ambient sounds or conversations
With the Transparency Mode activated, you can hear ambient sounds or communicate without having to remove the headphones (not possible when making phone calls). This allows you to hear e.g. announcements in the train or aircraft or to have short conversations. The Transparency Mode optimally complements the active noise cancellation ANC. If you use the Transparency Mode, disturbing sounds, e.g. low-frequency noise such as aircraft noise, are always suppressed so that you can stay relaxed and in touch with your surroundings.
Switching between the active noise cancellation ANC and the Transparency Mode
You can use the main button to switch between the active noise cancellation ANC and the Transparency Mode, e.g. if you want to transition from ambient awareness to idle mode as quickly as possible. This function is not available during an active call, see: > 27. To switch between the modes, press the main button 2x.
2x

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Using the headphones

Adjusting the playback pause in the Transparency Mode
You can select how the audio playback behaves in the Transparency Mode (press the main button 2x). To be able to adjust this setting, you require the Smart Control app (> 18).
In the Smart Control app, select the desired Transparency Mode function in the “Active Noise Cancellation” section:

Automatic pause” activated* deactivated

Description
Audio playback (e.g. music) is muted and you hear only ambient sounds.
Audio playback (e.g. music) continues and is mixed with ambient sounds.

*default setting

Adjusting the active noise cancellation ANC
To be able to adjust settings for the active noise cancellation ANC, you require the Smart Control app (> 18).
Select the desired setting in the “Active Noise Cancellation” section of the Smart Control app:

ANC setting

Reduction of low-frequency noise and background noise

“Wind Noise Reduction”

Off Wind noise reduction off

On*

Automatically adjusted reduction to minimize disturbing wind or movement noise

*default setting

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Using the headphones

Listening to music using the headphones
You can listen to music when the headphones and your audio source are connected via Bluetooth (> 14) or via USB (> 32).
Controlling music playback
The following music functions are only available when the headphones and the device are connected via Bluetooth or USB. Some smartphones or music players may not support all functions.

Use the music and call control button and the main button:

Button

Function

1x

Press 1x

Plays or pauses music

1x

2x 2x

Press 2x

Pauses music and switches to idle mode

If music playback does not start: · Check if the playback pause is activated in the Transpar-
ency Mode (> 25) and deactivate the function if necessary. · Start the music playback app on your Bluetooth device.

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Using the headphones

Playing the next/previous track Press the music and call control button several times.

Button

Function

2x

Press 2x

Plays the next track in the playlist

3x

Press 3x

Plays the previous track in the playlist

Making phone calls using the headphones
The following call functions are only available when the headphones, the smartphone or the PC/Mac are connected via Bluetooth (> 14). Some smartphones or communication apps may not support all functions. During a call, the active noise cancellation ANC is always activated to ensure the best possible speech intelligibility. The Transparency Mode cannot be used.
If the headphones are switched off during an active call or if the rechargeable battery is empty, the call is put on hold and you can use your smartphone as an output device as usual.
Making a call
Dial the desired number on your smartphone. If your smartphone does not automatically transfer the call to the headphones, select “ACCENTUM” as the output device on your smartphone (see the instruction manual of your smartphone if necessary).

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Using the headphones

Accepting/rejecting/ending a call
If your headphones are connected to a smartphone and you receive a call, you hear a ring tone in the headphones.
If you are playing music when you receive a call, the music pauses until you end the call.

Use the music and call control button:

Button
1x 1x

Press 1x

Function Accepts a call
Ends an active call

Rejects a call

Press for

2sec

2 sec

Rejects an incoming call and ends

the active call

1

Puts an active call on hold

2x

Accepts an incoming call and puts

2

Press 2x

the active call on hold

Toggles between active call and call

2x

on hold

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Using the headphones
Muting the microphone To mute the headphones’ microphone during a call: Press the main button 1x.
You hear the voice prompt “Mute on”. The microphone is muted. To activate the microphone again: Press the main button 1x.
You hear the voice prompt “Mute off”. The microphone is reactivated.

1x

1x

Using the Sidetone function
When using the headphones for phone calls, you may find it more comfortable if your own voice is audible in the headphones. With the Sidetone function activated, your own voice is played back through the headphones during a phone call.
Via the Smart Control app, you can activate the function (default setting) and adjust the intensity via a slider or deactivate the function.

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Using the headphones

Using the voice assistant/voice dialing
The voice assistant is only available when the headphones and the mobile device are connected via Bluetooth or USB. Some smartphones or music players may not support all functions. Press the main button 1x.
The available voice assistant of your mobile device is activated (depending on the system used or app installed on your mobile device: Siri, Google Assistant or others. If no voice assistant is available, voice dialing may be activated). Speak your request.
R
1x

To cancel the voice assistant or voice dialing: Press the main button 1x.
R
1x

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Using the headphones
Adjusting sound effects/the equalizer
To be able to use the sound effects/the equalizer, you require the Smart Control app (> 18). In the Smart Control app, select the desired sound effects via the
equalizer. You can use predefined presets, define sound modes (e.g. bass boost) or define your own settings. The sound effects are stored in the headphones. These sound settings are active even without using the Smart Control app, i.e. when you are using a different Bluetooth device.
The Sound Check function of the Smart Control app allows you to create customized equalizer presets. Sound Check guides you step by step to the optimal results.
Setting the voice prompts/sound signals
To be able to set the voice prompts and sound signals, you require the Smart Control app (> 18). In the app settings, you can activate voice prompts and sound signals (default setting) or deactivate them completely.
Deactivating Bluetooth/activating flight mode
Deactivate the Bluetooth wireless connection when wireless connections are not allowed, such as on an aircraft during take-off and landing. The active noise cancellation ANC can be fully used provided that the rechargeable battery is charged (> 25). To deactivate the Bluetooth wireless connection and activate flight mode: Press the main button 5x.
You hear the voice prompt “No connection”. The Bluetooth wireless connection is deactivated.
ON/OFF R
5x
To activate the Bluetooth wireless connection again: Press the main button 5x.
You hear the voice prompt “Connected”. The Bluetooth wireless connection is activated.
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Using the headphones

Connecting the headphones using the USB cable
When you connect the headphones to a Mac/PC/mobile device using the supplied USB cable, you can play audio content from your Mac/PC/mobile device directly through the headphones.
The headphones are automatically charged when you connect them to a Mac/PC/mobile device using the USB cable.
Setting up the headphones as the default audio output and audio input device for your Mac/PC/mobile device
Make sure that possible Bluetooth connections are disconnected. Connect the headphones and the Mac/PC or mobile device via
the USB cable. The headphones are charged via the USB connection.
From the Systems Preferences or Control Panel of your Mac/PC/ mobile device, select “ACCENTUM” as the default audio playback device and/or default audio recording device.
Start music playback from the Mac/PC/mobile device. The music is played through the headphones and the microphone is used for recording.

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Using the headphones
Storing and transporting the headphones
CAUTION Pointed objects can damage the product! If pointed objects pierce the ear pads of the product, the ear pad and the function of the product may be damaged. Do not transport the product in your bag together with pointed
objects. Handle the headphones with care when you are not using or transporting them. Store the headphones in a clean, dust-free place out of reach of sharp objects.
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Care and maintenance

Care and maintenance
CAUTION Liquids can damage the electronics of the product! Liquids entering the housing of the product can cause a short-circuit and damage the electronics. Keep all liquids far away from the product. Do not use any solvents or cleansing agents.
Clean the parts of the product only with a soft, dry cloth. To clean the charging socket: Blow vigorously over the charging socket. If necessary, carefully remove any stuck dirt from the charging
socket using a dry, soft brush or a dry interdental brush. Only apply gentle pressure when doing so.
Replacing the ear pads
For reasons of hygiene, you should replace your ear pads from time to time. Spare ear pads are available at www.sennheiser-hearing.com/accentum-wireless (to purchase online or contact your local Sonova Consumer Hearing partner: www .sennheiser-hearing.com/service-support) Peel the ear pad up and away from the ear cup. Assign the right ear pad to the right ear cup and the left ear pad
to the left ear cup. Place the new ear pad onto the ear cup. Press the ear pad onto the ear cup so that the ear pad is fixed in
the notch of the ear cup.
Left L

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Care and maintenance
Information on the built-in rechargeable battery
Sonova Consumer Hearing GmbH ensures and guarantees that the rechargeable batteries perform at their optimum upon purchase of the product. If, upon purchase or within the warranty period, you suspect that a rechargeable battery is obviously defective or if a charging error/battery error is displayed (> 9), stop using the product, disconnect it from the power supply system and contact your Sonova Consumer Hearing partner. Your Sonova Consumer Hearing partner will coordinate the repair/replacement with you. Do not return a product with a defective battery to your dealer or Sonova Consumer Hearing partner unless requested to do so. To find a partner in your country, search at www.sennheiser-hearing.com/service-support. At the end of its operational lifetime, this product with its built-in rechargeable battery must be disposed of separately from normal household waste. You can find more information here:

39. Installing firmware updates
    Firmware updates can be downloaded free of charge from the Internet using the Sennheiser Smart Control app. Sonova Consumer Hearing recommends to always install the latest firmware version to ensure the best performance of your product. Connect the headphones to your smartphone and start the Smart
    Control app (> 18). The app provides information on available firmware updates and
    guides you through the installation process.
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FAQ/If a problem occurs …

FAQ/If a problem occurs …
If a problem has occurred, proceed in the following order until the problem is solved and you can use the headphones again:
1. Press the main button for 15 seconds (reset) (> 37).
2. Connect the headphones to the Smart Control app to install the latest firmware (> 35).
3. Reset the headphones to the factory default settings (> 37).
4. Check the list of frequently asked questions to see if there is a solution to the problem (> 36).
5. Contact your Sonova Consumer Hearing partner to solve the problem (> 36).
Current list of frequently asked questions (FAQ) Visit the ACCENTUM product page at www.sennheiser-hearing.com/download. There you will find a current list of frequently asked questions (FAQ) and suggested solutions.
Your question has not been answered or the problem persists? If a problem occurs that is not listed in the FAQ section or if the problem cannot be solved with the proposed solutions, please contact your Sonova Consumer Hearing partner for assistance. To find a partner in your country search at www.sennheiser-hearing.com/service-support.
Leaving the Bluetooth transmission range Wireless calling and streaming are only possible in the Bluetooth transmission range of your smartphone. The transmission range largely depends on environmental conditions such as wall thickness, wall composition etc. With a free line of sight, the transmission range of most smartphones and Bluetooth devices is up to 10 meters. If you, and therefore the headphones, leave the Bluetooth transmission range of the smartphone, the sound quality deteriorates increasingly until you hear the voice prompt “Lost connection” and the connection breaks down completely. If you immediately re-enter the Bluetooth transmission range, the connection is automatically re-established.

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FAQ/If a problem occurs … Resetting the headphones If the function of the headphones is disturbed, perform a reset. Individual settings such as the pairing settings are not deleted.
Press the main button for 20 seconds. You hear a short confirmation sound. R
20s
Deleting the Bluetooth pairing list of the headphones You can delete the Bluetooth pairing list using the Smart Control app. Follow the instructions in the app. Resetting the headphones to the factory default settings To be able to reset the headphones to the factory default settings, you require the Smart Control app (> 18). Switch on the headphones (> 18) and connect them to a Bluetooth
device on which the Smart Control app is available. Select the “Factory default settings” function in the app settings. Follow the instructions in the app.
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Specifications

Specifications

Model: ACAEBT

Wearing style

Bluetooth® around-ear, closed-back

Ear coupling

circum-aural

Transducer principle

dynamic

Transducer

37 mm

Frequency response

10 Hz to 22,000 Hz (­10 dB)

Sound pressure level (SPL) 106 dB (1 kHz/0 dBFS)

THD (1 kHz, 100 dB SPL) < 0.3 % (1 kHz, 100 dB SPL)

Microphone principle

MEMS

Microphone frequency response

50 Hz to 8,000 Hz (­3 dB)

Microphone pick-up pattern (speech audio)

2 omni-directional microphones (beamforming)

Power supply

built-in rechargeable lithium-ion
battery: 3.7 V , 800 mAh, 2.96 Wh USB charging: 5 V , 700 mA max.

Charging time of recharge- approx. 3 hrs able battery

Operating time

up to 50 hrs (music playback via Bluetooth with ANC activated)

Temperature range

operation: 0 °C to +40 °C charging: +10 °C to +40 °C storage: ­20 °C to +60 °C

Relative humidity (non condensing)

operation: 10 to 80 % storage: 10 to 90 %

Weight (headphones)

approx. 222 g

Magnetic field strength

3.00 mT

Bluetooth

Version Transmission frequency Modulation Profiles Output power Codec Device name Number of active connections

Bluetooth 5.2 compliant, class 1 2,402 MHz to 2,480 MHz GFSK, /4 DQPSK, 8DPSK A2DP, AVRCP, HFP, HSP, GATT 10 mW (max) aptXTM HD, AAC, SBC ACCENTUM (individually adjustable) 2

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Manufacturer declarations
Manufacturer declarations
Warranty Sonova Consumer Hearing GmbH gives a warranty of 24 months on this product. For the current warranty conditions, please visit our website at www .sennheiser-hearing.com/warranty or contact your Sonova Consumer Hearing partner.
In compliance with the following requirements · General Product Safety Directive (2001/95/EC) · Compliant to Sound Pressure Limits according to country spe-
cific requirements
EU declaration of conformity · RoHS Directive (2011/65/EU) Hereby, Sonova Consumer Hearing GmbH declares that the radio equipment type ACAEBT is in compliance with the Directive 2014/ 53/EU. The full text of the EU declaration of conformity is available at the following Internet address: www.sennheiser- hearing.com/download.
UK declaration of conformity · RoHS Directive (2012) · Radio Equipment Regulations (2017)
Notes on disposal · EU: Battery Directive (2006/66/EC & 2013/56/EU) · EU: WEEE Directive (2012/19/EU) · UK: Battery Regulations (2015) · UK: WEEE Regulations (2013) The symbol of the crossed-out wheeled bin on the product, the battery/rechargeable battery (if applicable) and/or the packaging indicates that these products must not be disposed of with normal household waste, but must be disposed of separately at the end of their operational lifetime. For packaging disposal, observe the legal regulations on waste segregation applicable in your country. Improper disposal of packaging materials can harm your health and the environment. The separate collection of waste electrical and electronic equipment, batteries/rechargeable batteries (if applicable) and packagings is used to promote the reuse and recycling and to prevent negative effects on your health and the environment, e.g. caused by potentially hazardous substances contained in these products. Recycle electrical and electronic equipment and batteries/rechargeable batteries at the end of their operational lifetime in order to make contained recyclable materials usable and to avoid littering the environment.
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Manufacturer declarations

If batteries/rechargeable batteries can be removed without damaging them, you are obliged to dispose of them separately (for the safe removal of batteries/rechargeable batteries, see the instruction manual of the product). Handle lithium-containing batteries/ rechargeable batteries with special care, as they pose particular risks, such as the risk of fire and/or the risk of ingestion in the case of coin batteries. Reduce the generation of battery waste as much as possible by using longer-life batteries or rechargeable batteries.
Further information on the recycling of these products can be obtained from your municipal administration, from the municipal collection points, or from your Sonova Consumer Hearing partner. You can also return electrical or electronic equipment to distributors who have a take-back obligation. Herewith you make an important contribution to the protection of the environment and public health.
Trademarks
Apple, the Apple logo and Siri are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc.
Android and Google Play are registered trademarks of Google Inc.
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Sonova Consumer Hearing GmbH is under license.
Qualcomm aptXTM is a product of Qualcomm Technologies International, Ltd. Qualcomm is a trademark of Qualcomm Incorporated, registered in the United States and other countries, used with permission.
aptXTM is a trademark of Qualcomm Technologies International, Ltd., registered in the United States and other countries, used with permission.
Other product and company names mentioned in the user documentation may be the trademarks or registered trademarks of their respective holders.

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References

• Official website and online shop | Sennheiser UK
• Download | Sennheiser US
• MOMENTUM 4 Wireless | Sennheiser US
• Service & Support | Sennheiser Australia
• Sennheiser

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