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Electrode Surface Profile and the Performance of Condenser Microphones

Fletcher, Neville H.; Thwaites, S


Condenser microphones of all types are traditionally made with a planar electrode parallel to an electrically conducting diaphragm, additional diaphragm stiffness at acoustic frequencies being provided by the air enclosed in a cavity behind the diaphragm. In all designs, the motion of the diaphragm in response to an acoustic signal is greatest near its center and reduces to zero at its edges. Analysis shows that this construction leads to less than optimal sensitivity and to harmonic distortion...[Show more]

CollectionsANU Research Publications
Date published: 2002
Type: Journal article
Source: Journal of the Acoustical Society of America
DOI: 10.1121/1.1515971


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