Chapter Eight

Cell phone acoustics

Abstract

This chapter begins discussing about an entertainment-type cell phone with a microphone, a receiver, and a “handsfree” loudspeaker followed by the basic design for a cell phone loudspeaker. The electromechanoacoustic circuit for the loudspeaker quantifies this design. A series of design considerations followed by an apparatus for testing the receiver is next. Two types of microphones are discussed: electret and microelectromechanical system. The chapter ends with acoustic measurements for type approval.

Keywords

Acoustics; Cell phones; Helmholtz resonator; Loudspeaker; Microphones; Turbulence

Part XXVI: Acoustical transducers for cell phones

The number of cell phones in the world is ...

Get Acoustics: Sound Fields, Transducers and Vibration, 2nd Edition now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.