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Amplitude Compression

Amplitude compression is a signal processing technique that applies more amplification or gain to low input sounds and increasingly less gain as input level increases. This contrasts with linear amplification where the same gain is applied to all input levels. This entry discusses the characteristics of compression, how it interacts with other components of amplification, and multichannel compression versus single channel compression. It also describes how compression is classified, the acoustic and perceptual effects of compression, and fitting hearing aids.

Characterization of Compression

Compression is achieved through the use of a feedback loop in which gain above a specific input level is reduced at a specified rate as input level increases. The static characteristics of a compression circuit at a given frequency can be visualized through an ...

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