ISOtunes XTRA IT-02 Guia De Inicio Rapido página 7

Shift Between Calls on Two Devices
While on a call with phone A, you can answer a call from phone B by
pressing the MFB once. This will put the call from phone A on hold. Press
the MFB again to shift back to the original call.
While on a call with phone A, you can end the call and answer a call with
phone B by pressing and holding the MFB for 2 seconds.
Noise Attenuation
APPROVAL: ISOtunes XTRA is tested and approved in accordance with
®
ANSI S3.19-1974 Specifi cations.
Frequency, Hz 125 250 500 1000
Grand Mean Attenuation, dB 28.5 25.4 30.3 32.8
Standard Deviation, dB 2.8 2.3 3.0 3.8
The level of noise entering a person's ear, when
are worn as directed, is closely approximated by the difference between the
A-weighted environmental noise level and the Noise Reduction Rating (NRR).
Improper fi t of this device will reduce its effectiveness in attenuating noise.
Consult the enclosed instructions for proper fi tting.
Example:
1. The surrounding noise level measured at the ear is 100 dB.
2. The NRR of ISOtunes XTRA is 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 gunfi re.
2000 3150 4000 6300 8000 NRR
37.7 42.0 40.9 44.0 44.6
27
2.8 3.3 3.6 2.7 3.4
headphones
ISOtunes XTRA
®