Circuit to improve transducer separation in handsfree telephone

Details Circuit to improve transducer separation in handsfree telephone Circuit to improve transducer separation in handsfree telephone

H - Electricity

04

M

H04M 1/20 (2006.01) H04M 1/19 (2006.01) H04M 1/60 (2006.01)

Patent

CA 2229424

In a device having a sound source within an enclosure and a first microphone for picking up sounds outside the enclosure, a system for improving acoustic separation between the sound source and first microphone comprising an additional microphone located approximately equidistant from the sound as the first microphone for picking up sounds within the enclosure, and a circuit connected to the firstmicrophone and the additional microphone for subtracting the sounds within the enclosure from the sounds outside the enclosure.

Dans un dispositif ayant une source sonore à l'intérieur d'un boîtier ainsi qu'un premier microphone destiné à capter des sons à l'extérieur du boîtier, un système permet d'améliorer la séparation acoustique entre la source sonore et le premier microphone. Ce système comprend un microphone supplémentaire situé à distance à peu près égale du son comme le premier microphone, afin de capter les sons à l'intérieur du boîtier, ainsi qu'un circuit relié au premier microphone et au microphone supplémentaire pour soustraire les sons à l'intérieur du boîtier des sons à l'extérieur du boîtier.

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