Safety Information

ISOtunes® ORIGINAL 2.0 comes with 4 sets of TRILOGY™ foam eartips (XS,S,M,L) and 3 sets of
silicone eartips (S,M,L). Choose the size that fits most snugly in your ear canal. Remember, the snugger
the fit, the better the noise blocking. The silicone eartips are intended for use when NOT in noisy
situations.
ISOtunes® TRILOGY™ foam eartips have a threaded core and the sound port on the earbud is also
threaded.
1. Twist the foam eartip counterclockwise to remove and clockwise to place on a new foam eartip.
2. Carefully compress the foam eartip on the stem/sound port.
3. Insert the foam/eartip into your ear as deeply as is comfortable and hold for 5 seconds while the foam
expands.
4. Repeat with second eartip.
Hint: To open your ear canal wider, lift the top of your ear up and away from your head, as shown in
FIG1.
Introduction
Thank you for purchasing ISOtunes® ORIGINAL 2.0 Professional Noise Isolating headphones. These
headphones 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 EN352-2:2002 and
the ANSI & NIOSH standards for a hearing protector, with a Single Number Rating (SNR) of 36 dB and 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® ORIGINAL 2.0 is tested and approved in accordance with ANSI S3.19-1974
Specifications and the European Safety Standard EN 352-2:2002.

ANSI
S3.19-1974
The level of noise entering a person’s ear, when ISOtunes® ORIGINAL 2.0 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.

A1: Frequency (Hz)
A2: Mean Attenuation (dB)
A3: Standard Deviation (dB)

Example:
1. The surrounding noise level measured at the ear is 100 dB.