ISOtunes IT-34 Link Aware Wireless Over-Ear Hearing Protection Instruction Manual

: June 6, 2024
: ISOtunes

Hearing Protector

Fitting

The headset is labeled and adjustable for your convenience.

Location of Controls

Music Volume Up
Music Volume Down
Aware Volume Up
Aware Volume Down
Multi-Function Button (MFB)
Bluetooth Mic
Charge Port
LED Charging Indicator
Battery Cover Latch

Aware Technology™

This product includes Aware Technology. This is a microphone technology that allows the user to hear the world around them, but always at a safe listening level. When ambient noise breaches a safe listening level, the microphone technology immediately responds and attenuates to a safe level.

This feature automatically turns on when the product turns on. Adjusting the Aware Volume is easy. Simply press the Aware Volume Up (3) and Down Button (4).

Charging

The Lithium Battery Pack comes fully installed. Please make sure the Battery Pack Cable is plugged into the Battery Pack Port (2).

The Lithium Battery Pack holds a 14+ hour charge.

Charging

The headset can be powered by the included rechargeable Lithium Battery Pack.
The Lithium Battery Pack holds a 14+ hour charge.

Batteries

The headset can also be powered by 3 AAA Batteries (not included).
3 AAA Batteries hold a 24+ hour charge and will need to be replaced.

Power On/Off

Power On: Press and hold MFB (5) for 3 seconds (you will hear “Power On”)
Power Off: Press and hold MFB (5) for 3 seconds (you will hear “Power Off”)

Bluetooth Pairing

After powering on, the headphones will automatically enter Pairing Mode.
(you will hear “Bluetooth Pairing Mode”)

Dual Connect Mode

This product can connect to two devices at the same time such as your phone and your computer.

Pair and Connect to your first device as described in Bluetooth Pairing. This will be device A.
Press and hold the MFB (5) for 7 seconds until you hear “Bluetooth Pairing Mode” (you will hear Power Off, keep holding the button until you hear “Bluetooth Pairing
Mode”)
Pair and Connect to the 2nd device as described in Bluetooth Pairing. This will be device B.
On Device A, go to the Bluetooth menu and manually connect to ISOtunes LINK Aware.
Both devices are now connected.

Pairing Reset
Press and hold the Volume Up (1) and the Volume Down (2) for 4 seconds. The product will enter pairing mode.

Music

Play/Pause: Short single press MFB (5)
Next Track: Double press MFB (5)
Previous Track: Triple press MFB (5)
Music Volume Up: Short single press Volume Up (1)
Music Volume Down: Short single press Volume Down (2)
Aware Volume Up: Short single press Volume Up (3)
Aware Volume Down: Short single press Volume Down (4)

Phone Calls

Answer/End Call: Short single press MFB (5)
Reject Call: Press and hold MFB (5) for 1 second

Siri / Google Assistant
Press and hold MFB (5) for 1 second

Fitting

ANSI S3.19-1974 Table (NRR Table)

A1: Frequency, Hz| 125| 250| 500| 1000| 2000| 3150| 4000| 6300| 8000| NPR
---|---|---|---|---|---|---|---|---|---|---
A2: Grand Mean Attenuation, dB| 19.9| 22.3| 27.8| 30.8| 38.8| 44.3| 50.0| 46.3| 42.4| 25
A3: Standard Deviation, dB| 3.7| 2.9| 2.4| 2.3| 3.8| 3.9| 3.8| 3.1| 4.3

EN 352-1:2002 Table (SNR Table)

B1: Frequency (Hz)| 125| 250| 500| 1000| 2000| 4000| 8000
---|---|---|---|---|---|---|---
B2: Mf (dB)| 17.5| 21.4| 26.6| 29.3| 37.6| 46.4| 39.6
B3: SF (dB)| 4.5| 2.5| 2.6| 2.3| 3.7| 4.6| 6.8
B4: APVf| 13.0| 18.9| 24.0| 27.0| 33.9| 41.8| 32.8
B5: SNR=30dB| H=34dB| M=27dB| L=21dB| APVf=MF-SF (dB)
---|---|---|---|---

EN 352-4 Level Dependent Criterion Level

C1:H	114 dB(A)
C2:M	108 dB(A)
C3:L	94 dB(A)

Audio Input (EN 352-6)
Bluetooth (HFP): The maximum SPL is 76.4 dB(A) at -14 dBFS

Entertainment (EN 352 – 8)
Bluetooth (A2DP): The maximum SPL is 77.1 dB(A) at -10 dBFS

Models

IT-34 ISOtunes LINK Aware
IT-35 ISOtunes LINK Aware EN 352

Important

Please read, understand, and follow all safety information.

The full manual can be found at ISOtunes.com/LINKAwareManual

Fitting

Remove white foam inserts from each earcup
Pull the earcups apart
Place the product on your head
Adjust the earcup position by extending the headband to ensure a good fit around the ears

Introduction

Thank you for purchasing ISOtunes® LINK Aware Professional Noise-Isolating Earmuffs. These earmuffs have been specifically designed for use in noisy environments — allowing you to block out much of the surrounding noise so that you can listen to your music or talk on the phone with less interruption. This product has been tested and meets the European Safety Standard EN352-1:2002, RED directive 2014/53/EU, harmonized Standard EN 60065-2014+A11-2017, EN 62479:2020, ETSI EN 300 328 V2.1.1, ETSI EN 301 489-1 V2.1.1, ETSI EN 301 489-17 V3.1.1 and the ANSI standards for a hearing protector, with a Single Number Rating (SNR) of 30 dB with a Noise Reduction Rating (NRR) of 25 dB. Full testing details are available in the Noise Attenuation section of this booklet.

**Noise Attenuation APPROVAL

**

ISOtunes® LINK Aware is tested and approved in accordance with ANSI 53.19-1974 Specifications and the European Safety Standard EN 3521:2002, EN 352-4:2001, EN 352-6:2002, and EN 352-8:2008.

This earmuff is provided with level-dependent attenuation. The wearer should check correct operation before use. If distortion or failure is detected, the wearer should refer to the manufacturer’s advice for maintenance and replacement of the battery.

ANY
S3.19-1974

The level of noise entering a person’s ear, when ISOtunes® LINK Aware headphones are worn as directed, is closely approximated by the difference between the A-weighted environmental noise level and the Noise Reduction Rating (NRR). Improper fit of this device will reduce its effectiveness in attenuating noise. Consult the enclosed instructions for proper fitting.

Al: Frequency (Hz)
A2: Mean Attenuation (dB)
A3: Standard Deviation (dB)

Example:

The surrounding noise level measured at the ear is 100 dB.
The NRR of ISOtunes® LINK Aware is 25 dB.
The noise level entering the ear is approximately equal to 75dB.

Please note that the NRR is based on the attenuation of continuous noise and may not be an accurate indicator of the protection attainable against impulsive noise, such as gunfire.

EN 352

This product is certified according to the product standards EN 352-1:2002, EN 352-4:2001, EN 352-6:2002, and EN 352-8:2008.

Haven Technologies hereby declares that IT-35 ISOtunes LINK Aware EN 352 conforms to the regulation (EU) 2016/425 and the directive RED 2014/53/EU which can be accessed at www.ISOtunes.co.uk/EU-declaration-of- conformity.

B1: Frequency (Hz)
B2: Mean Attenuation (dB)
B3: Standard Deviation (dB)
B4: Assumed Protection Value (APV) (dB)
B5:

H = Hearing protection estimation for high frequency sounds (f Z 2000Hz)
M = Hearing protection estimation for medium frequency sounds (500 Hz < f < 2000Hz)
L = Hearing protection estimation for low frequency sounds (f s 500Hz)

Criterion level is the sound pressure level in dB(A) of the noise environment resulting in 85 dB(A) being effective to the ear while wearing hearing protectors. Three different criterion levels are defined related to the frequency content of the noise.

C1: H = criterion level for high-frequency noise
C2: M = criterion level for medium-frequency noise
C3: L= criterion level for low-frequency noise

SafeMax™ Technology
ISOtunes® LINK Aware incorporates SafeMax™ Technology, therefore its volume output has been limited to 85 decibels (IT-34) and 79 decibels (IT-35). ISOtunes® devices with SafeMax ™ Technology are OSHA, and ANSI compliant and, when designated, meet the European Safety Standard EN352.

Aware Technologyn™

This product includes Aware Technology. This is a microphone technology that allows the user to hear the world around them, but always at a safe listening level. When ambient noise breaches a safe listening level, the microphone technology immediately responds and attenuates to a safe level.

This feature automatically turns on when the product turns on. Adjusting the Aware volume is easy. Simply press the Aware Volume Up and Down Button.

Cleaning and Maintenance

Clean your ISOtunes LINK Aware by gently wiping them with a clean, damp cloth with mild soap.
Do not immerse the hearing protector in water.
Do not use abrasive cleaning solvents to clean the hearing protector.

If the hearing protector gets wet from sweat or rain, please discontinue use and turn the earmuff outwards and allow it to dry.

The ear cushions and foam liners should be regularly inspected for deterioration, cracking, or other damage.

Materials

Ear Cushion: PU + Memory Foam.
Casing: ABS
Key Pad: Silicon
Headband: Stainless Steel + TPE
Headband Bracket: ABS

This product comes with a Lithium Battery Pack. The Battery Pack can be recharged by plugging one end of the included cable into a USB outlet and the other end into the product’s charging port located underneath the rubber cover on the bottom of the left earcup.

The batteries can be checked by removing the battery cover. Slide the latch to release the door.

The lithium battery pack can be removed from the product and replaced.
Lift the battery out. Unplug the battery pack cable. To reinstall, put the battery pack into the compartment and plug the Battery pack cable into the battery pack port. Ensure the battery pack cable is plugged into the battery pack cable port for proper product performance.

Alternatively, three AAA batteries can power the device. Completely remove the Lithium Battery Pack from the product and install the AAA batteries as indicated on the product. Do not attempt to use the Lithium Battery Pack and AAA batteries at the same time.

Automatic Power Off
ISOtunes® LINK Aware will turn off automatically after 4 hours of use.

WARNINGS
Performance may deteriorate with battery use. The typical period of continuous use that can be expected from the ear-muff battery is 11 hours.

The output of the level-dependent circuit of this hearing protector may exceed the external sound level.

ISOtunes® LINK Aware does an excellent job of blocking outside noise. As such, ISOtunes® LINK Aware should NOT be used in environments where users need to be fully aware of their surroundings for personal safety reasons. For example, do NOT use them while driving a car or riding a motorcycle. Similarly, do NOT use them when riding a
bicycle outside. The user is solely responsible for ensuring that ISOtunes® LINK Aware is used ONLY in safe environments.

The output of the electrical audio circuit of this hearing protector may exceed the daily limit sound level.

These earmuffs are intended to protect your ears against hazardous noise.

The audibility of warning signals at a specific workplace may be impaired while using the entertainment facility.

This product may be adversely affected by certain chemical substances, such as sunscreen and bug spray. Further information may be sought from the manufacturer.

The fitting of hygiene covers to the cushions may affect the acoustic performance of the ear-muffs.

Recommendations The wearer should ensure the product is properly cleaned and dry before and after use. Storage should be in a clean and dry location between -20 °C and 50 °C. The battery should not be fully discharged before long-term storage.

The wearer should ensure that:

The hearing protector is fitted, adjusted, and maintained in accordance with the manufacturer’s instructions.
The hearing protector is worn at all times in noisy surroundings.
The hearing protector is regularly inspected for serviceability.

If these recommendations are not adhered to, the protection afforded by the hearing protector will be severely impaired.

The size range for the earmuff is S ML.

The mean mass of the product is 430g.
Date of Obsolescence: 3 years from purchase date.
Not to be used in Explosive Atmospheres.

Additional Notes
ISOtunes® LINK Aware is compliant with Bluetooth® V4.2. We do not guarantee the compatibility of all functions on every Bluetooth®-enabled device. Please check your device’s user manual for compatibility and functionality.

Please note, the hearing protector provides an entertainment audio facility. The ear-muff provides audio signal sound pressure level limitation which limits the entertainment audio signal to 82 dB(A) effective to the ear. This limit is maintained for Bluetooth signal inputs which are standard to the Bluetooth A2DP, HFP, and HSP specifications. There is no analog line input on this product.

This earmuff is provided with electrical audio input. The wearer should check correct operation before use. If distortion or failure is detected, the wearer should refer to the manufacturer’s advice.

For additional information about ISOtunes® LINK Aware please visit www.ISOtunes.com/LINKAwareManual. For additional information or questions about ISOtunes® products or spares and accessories, please contact our support team.

Replacement Parts: Hygiene Kit (ear-cushions and foam inserts) Model Number: IT-83

Replace ear-cushions:

Put your finger between the ear cushions and foam.
Pull the Foam Ear cushion away from the earcup.
Remove the foam inserts in the earcup.
Install the new foam inserts
Snap the new ear-cushion in place on the earcup

The following information shall be available from the manufacturer on request:

results of tests performed in accordance with this standard;
the name and country of the test laboratory which performed the tests specified and the date of the tests.

FCC

Caution: The user is cautioned that changes or modifications not expressly approved by the party responsible for compliance could void the users’ authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for

This equipment complies with FCC’s RF radiation exposure limits set forth for an uncontrolled environment. End-users must follow the specific operating instructions for satisfying RF exposure compliance. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

UK & Europe
uk-eurosupport@isotunesaudio.com

North America
support@isotunesaudio.com
1-844-396-3737
Monday-Friday 9-5 ET