User Manual

EN | 14
Fitting
ANSI S3.19-1974 Table (NRR Table)
EN352-2:2002 Table (SNR Table)
B5: SNR=30dB H=34dB M=27dB L=21dB
Important
Please read, understand, and follow all safety information.
Fitting
1. Pull the earcups apart
2. Place the product on your head
3. Adjust the earcup position by extending the headband to
ensure a good t around the ears
Introduction
Thank you for purchasing ISOtunes® LINK Professional Noise
Isolating Earmus. These earmus have been specically
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, EN352-8:2002 and the ANSI & NIOSH standards
for a hearing protector, with a Single Number Rating (SNR) of 36
dB with a Noise Reduction Rating (NRR) of 27 dB. Full testing
details are available in the Noise Attenuation section of this
booklet.
Noise Attenuation
APPROVAL: ISOtunes® LINK is tested and approved in
accordance with ANSI S3.19-1974 Specications and the
European Safety Standard EN 352-1:2002 and EN352-8:2002.
ANSI
S3.19-1974
The level of noise entering a person’s ear, when ISOtunes®
LINK headphones are worn as directed, is closely approximated
by the dierence between the A-weighted environmental noise
level and the Noise Reduction Rating (NRR). Improper t of this
device will reduce its eectiveness in attenuating noise. Consult
the enclosed instructions for proper tting.
A1: Frequency (Hz)
A2: Mean Attenuation (dB)
A3: Standard Deviation (dB)
Example:
1. The surrounding noise level measured at the ear is 100 dB.
2. The NRR of ISOtunes® LINKis 24 dB.
3. The noise level entering the ear is approximately equal to 76
dB.
Frequency, Hz 125 250 500 1000 2000 3150 4000 6300 8000 NRR
Grand Mean Attenuation, dB 19.9 21.6 26.4 29.9 37.9 42.6 48.8 44.1 41.7
Standard Deviation, dB 3.8 2.9 2.1 2.5 3.7 2.9 3.7 4.1 4.7
24
A1:
A2:
A3:
Frequency (Hz) 125 250 500 1000 2000 4000 8000
Mf (dB) 19.8 22.0 26.9 30.5 37.7 49.1 41.4
sf (dB) 3.7 2.9 2.6 3.1 3.6 4.0 4.8
APVf 16.1 19.1 24.3 27.4 34.1 45.1 36.6
B1:
B2:
B3:
B4:
APVf=MF-SF9
(dB)