A/D converter with integrated biasing for a microphone

Acoustic sensor and electric stethoscope device...

Active electronic noise suppression system and method for reduci

Alternative sensing circuit for MEMS microphone and sensing...

Amplifier circuit for capacitive transducers

Amplifier circuit for electret condenser microphone

Amplifier circuit for electret microphone with enhanced...

Amplifier circuit for electret microphone with enhanced...

Amplifier device for a condenser microphone

Apparatus and method for providing proper microphone DC bias cur

Apparatus and method to provide advanced microphone bias

Apparatus for reproducing sound with a reduced dynamic range

Audio A/D converter using frequency modulation

Audio A/D convertor using frequency modulation

Audio amplifier system using a class D amplifier

Audio circuit

Audio input circuit for voice recognition

Audio processing method and system

Audio signal recording apparatus

Calibrated microelectromechanical microphone