Audio device with a voice coil channel and a separately amplified telecoil channel

Abstract

A portable audio device has a voice coil audio signal processor in which a desired audio content signal is combined with an anti-noise signal produced by an active noise cancellation block. A voice coil amplifier receives a volume setting and is coupled to an output of the voice coil audio signal processor. A speaker is coupled to an output of the voice coil amplifier. In addition, a telecoil audio signal processor also receives the desired audio content, and feeds a telecoil amplifier that receives a telecoil coupling strength setting, followed by a telecoil. Other embodiments are also described and claimed.

1 - 14 . (canceled) 
     
     
         15 . A portable audio device comprising:
 a voice coil audio signal processor coupled to receive desired audio content, wherein the voice coil audio signal processor comprises an audio signal processing chain whose output signal is combined with an anti-noise signal produced by an active noise cancellation block to produce a combined signal;   a telecoil audio signal processor coupled to receive and adjust the desired audio content and not the anti-noise signal, to produce an adjusted, desired audio content signal without the anti-noise signal;   a voice coil amplifier having an input coupled to an output of the voice coil audio signal processor;   a speaker coupled to an output of the voice coil amplifier;   a telecoil amplifier having an input coupled to an output of the telecoil audio signal processor; and   a telecoil coupled to an output of the telecoil amplifier.