Turning The Headset On And Off; Adjusting The Sound Amplification; Noise Attenuation (According To The Standard En 352-1: 2002); Sound Pressure Level (According To The Standard En 352-4: 2001 + A1: 2005) - Num'axes CAS1034 b Guide D'utilisation

Turning the headset on and off

To turn your headset on, simply turn the button ON/OFF situated on the right cup in a clockwise direction.
A light "click" will tell you that you have just turned the headset on. The red led situated on the right cup
turns on.
To turn off your headset, turn the button in an anticlockwise direction. A light "click" will tell you that you
have just turned the headset cup off. The red led situated on the right cup turns off.

Adjusting the sound amplification

To amplify the sound, once your headset is turned on, simply continue turning the button ON/OFF situated
on the right cup in a clockwise direction. Low environmental noises will be amplified up to three times, if
you turn the button up to the maximum.

Noise attenuation (according to the standard EN 352-1: 2002)

On average, the NUM'AXES headset attenuates noises that are dangerous for your hearing by 27 dB.
Minimum Sound Attenuation (according to the standard EN 352-1: 2002)
SNR = 27 dB H = 31 dB
Frequency
[Hz]
63
125
250
500
1000
2000
4000
8000

Sound pressure level (according to the standard EN 352-4: 2001 + A1: 2005)

H = 110 dB M = 97 dB
Guide d'utilisation CAS1034 b – ind.B – novembre 2021
M = 24 dB L = 17 dB
Sound attenuation
[dB]
15.7
14.1
16.9
24.9
30.8
30.6
38.7
36.8
L = 91 dB
Standard
APV
deviation
[dB]
[dB]
3.4 12.3
3.3 10.8
2.3 14.6
2.4 22.5
2.7 28.1
2.2 28.4
3.8 34.9
4.1 32.7
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