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 the diagram.
Noise Attenuation
APPROVAL: ISOtunes® Geronimo is tested and approved in accordance with ANSI
S3.19- 1974 Specifications.
NRR Testing
The level of noise entering a person’s ear, when ISOtunes® XTRA 2.0headphones 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.
Example:
1. The surrounding noise level measured at the ear is 100 dB.
2. The NRR of ISOtunes® XTRA 2.0is 27 dB.
3. The noise level entering the ear is approximately equal to 73 dB.
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.
Wearer Information
●
The headphone limits the audio output to 85 dB(A).
●
To prevent damage to the headset function, do not subject it to rough handling.
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