7
Reduction of subjectively perceived noise level
NoiseGard
®
mobile
are dynamic stereo headphones which, in addition to transmitting
an audio signal, also electronically compensate low-frequency noise. This active
noise compensation functions according to the physical principle that noise and
„anti-noise“ (exactly reversed in phase) cancel each other out.
So, now you can enjoy your music undisturbed, without having to turn the volume
up so high that surrounding noise is completely drowned out.
The
NoiseGard
®
compensation electronics in the headphone requires its own power
supply. This is provided by the power supply unit which is fixed to the cable.
The headphone is connected in the usual manner by a 3.5-mm stereo jack plug, by
an adapter to two 3.5-mm mono jack plugs (in aircraft) or by means of a 6.3-mm
adapter (to the hi-fi unit at home). Both adapters are supplied.
Noise compensation with noisegard
100
200
500
1000
5000
2000
Frequency / Hz
0
10
Attenuation in dB
Human speech
Warning Signal
20
Reduction of the
subjectively perceived
noise level with
Noisgard