Electret transducer equations by Lagrange’s equation
作者:
Melville S. Hawley,
Frank F. Romanow,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1978)
卷期:
Volume 64,
issue 2
页码: 694-696
ISSN:0001-4966
年代: 1978
DOI:10.1121/1.381997
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The equations of motion of the electret foil transducer are derived by applying Lagrange’s equation to the total electrical and mechanical energies of the transducer system. The resulting equations apply for the operation of the transducer both as a sound source and as a sound pickup. An expression for the induced static surface‐charge density on the back plate is obtained from these equations modified for the quiescent state. An electrical circuit model of the transducer is given for linear operation.
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