Advances in Digitization of Microphones and Loudspeakers

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Authors

  • Zbigniew KULKA Warsaw University of Technology Institute of Radioelectronics, Electroacoustics Division

Abstract

The development of digital microphones and loudspeakers adds new and interesting possibilities of their applications in different fields, extended from industrial, medical to consumer audio markets. One of the rapidly growing field of applications is mobile multimedia, such as mobile phones, digital cameras, laptop and desktop PCs, etc. The advances have also been made in digital audio, particularly in direct digital transduction, so it is now possible to create the all-digital audio recording and reproduction chains potentially having several advantages over existing analog systems.

Keywords:

electret condenser microphone, digital microphone, CMOS-MEMS digital microphone, digital microphone array, sigma-delta ADC/DAC, digital loudspeaker, CMOS-MEMS digital loudspeaker, digital loudspeaker array