Active headset with bridge amplifier

Details Active headset with bridge amplifier Active headset with bridge amplifier

H - Electricity

04

R

H04R 3/02 (2006.01) A61F 11/14 (2006.01) G10K 11/178 (2006.01)

Patent

CA 2289033

An active headset providing for reduction of external noise over a given frequency range by a microphone which generates an external noise cancellation signal spectrum, wherein a bridge amplifier circuit is interposed between the microphone (10) and the loudspeaker (20) and the gain of the bridge amplifier for peak amplitude of the noise cancellation signal is user adjustable (30) without substantially reducing the breadth of the given frequency range over which noise reduction is effective.

Casque d'écoute actif permettant la réduction du bruit extérieur sur une plage de fréquences donnée, au moyen d'un microphone qui génère un spectre de signaux d'annulation de bruit extérieur, un circuit amplificateur en pont étant placé entre le microphone (10) et le haut-parleur (20) et le gain de l'amplificateur en pont pour l'amplitude de crête du signal d'annulation de bruit étant ajustable (30) par l'utilisateur sans que la largeur de la plage de fréquences donnée dans laquelle la réduction de bruit est efficace ne soit sensiblement réduite.

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