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®
mobile
NoiseGard
The first „open-air" stereo headphone with
At just 110 g, this „open-air" stereo headphone with active noise compensation is
extremely light and provides excellent wearer comfort. Sound coupling to the ear
is directly on the ear.
When you are wearing the
to join in conversation - the voice of the person talking to you is scarcely
changed, since the speech frequency is practically unaffected by compensation.
Warning or emergency signals remain audible.
Understanding speech is even improved by
by low-frequency sound is eliminated.
Switching on/off
ON/OFF switch for the power supply to the compensation electronics is situated
on the battery box. A green LED lights up as a check.
If the power supply is switched off or the batteries are worn out, the headphone
can still be used as a normal headphone without noise compensation.
Inserting the batteries in the power supply unit
HDC 451
NoiseGard
active noise compensation
®
NoiseGard
HDC 451 you will still be able
®
mobile
NoiseGard
®
ON/OFF
, as „upward-masking"
LED
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