Linearity problems are a major aspect in electroacoustical engineering. Improvements of recording techniques led to the point that the formerly negligible nonlinearities within the microphones have become obvious. Measurements on condenser microphones have shown that even moderate sound pressure levels may cause significant intermodulation distortion. The measurement results are presented and the influences of the different electroacoustical parameters are discussed. Improvements are described which are obtainable with a symmetrically constructed capacitive transducer.
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