ISOtunes XTRA 2.0 Bedienungsanleitung Seite 5

Important
Please read, understand, and follow all safety
information. This product is designed to protect
against harmful noise. IT-25 is the EN 352 Certified
Model. IT-22 and IT-27 are not EN 352 Certified.
Fitting
ISOtunes® XTRA EN352 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® XTRA 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® XTRA 2.0 is tested and
approved in accordance with ANSI S3.19-1974
Specifications and the European Safety
Standard EN 352-2:2002, EN 352-9:2020, EN
352-10:2020.
ANSI S3.19-1974
The level of noise entering a person's ear,
when ISOtunes® XTRA 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.
2. The NRR of ISOtunes® XTRA 2.0 is 27 dB.
3. The noise level entering the ear is
approximately equal to 73dB.
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.
EN352
B1: Frequency (Hz)
B2: Mean Attenuation (dB)
B3: Standard Deviation (dB)
B4: Assumed Protection Value (APV) (dB
H = Hearing protection estimation for
high frequency sounds (f ≥ 2000Hz)
M = Hearing protection estimation for
medium frequency sounds
(500 Hz < f < 2000Hz)
L = Hearing protection estimation for
low frequency sounds (f ≤ 500Hz)
Hereby the EU declaration of conformity can be
accessed at ISOtunes.co.uk/manuals
The products will be certified to the Product
standard EN 352-2:2002, EN 352-9:2020, EN 352-
10:2020, and the PPE Regulation 2016/425.
Silicone eartips are NOT tested for SNR. Under
EN 352, they are not recommended for use as
EN
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