preemphasis

American  

[pree-em-fuh-sis] / priˈɛm fə sɪs /

Or pre-emphasis

noun

Electronics.

1. a process of increasing the amplitude of certain frequencies relative to others in a signal in order to help them override noise, complemented by deemphasis before final reproduction of the signal being received.

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Etymology

Origin of preemphasis

First recorded in 1940–45; pre- + emphasis

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