Transient (acoustics)
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Transient Acoustics

In acoustics and audio, a transient is a high amplitude, short-duration sound at the beginning of a waveform that occurs in phenomena such as musical sounds, noises or speech.[1][2] Transients do not necessarily directly depend on the frequency of the tone they initiate. It contains a high degree of non-periodic components and a higher magnitude of high frequencies than the harmonic content of that sound.[3]

Transients are more difficult to encode with many audio compression algorithms, causing pre-echo.[4]


The term transient is used by military sonar operators to describe unexpected sounds emanating from another vessel such as operating machinery, a metal hatch being slammed, or the flooding and pressurization of torpedo or vertical launch tubes.[]

See also


  1. ^ Crocker, Malcolm J. (ed); Stepanishen, Peter (1998). Handbook of Acoustics. NY: John Wiley and Sons, Inc. p. 119. ISBN 0-471-25293-X.CS1 maint: extra text: authors list (link)
  2. ^ Gibson, William A. (2007). The Ultimate Live Sound Operator's Handbook. NY: Hal Leonard Books. p. 49. ISBN 978-1-4234-1971-6.
  3. ^
  4. ^ Painter, Ted; Spanias, Andreas (April 2000). "Perceptual Coding of Digital Audio". IEEE. 88 (4): 471-474. doi:10.1109/5.842996. S2CID 1390521.

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