Chapter Eight

Cell phone acoustics


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.


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

Part XXVI: Acoustical transducers for cell phones

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

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