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Transient (acoustics)
 
 
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In acoustics
Acoustics

Acoustics is the interdisciplinary science that deals with the study of sound, ultrasound and infrasound . A scientist who works in the field of acoustics is an acoustician....
 and audio
Sound

Sound is vibration transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a threshold of hearing to be heard, or the sensation stimulated in organs of hearing by such vibrations....
, a transient is a short-duration signal
Signal

Signal, signals, signaling, or signalling may refer to:...
 that represents a non-harmonic attack phase of a musical sound or spoken word. It contains a high degree of non-periodic components and a higher magnitude
Magnitude (mathematics)

The magnitude of a mathematical object is its size: a property by which it can be larger or smaller than other objects of the same kind; in technical terms, an ordering of the class of objects to which it belongs....
 of high frequencies than the harmonic content of that sound. Transients do not directly depend on the frequency of the tone they initiate.

Transients are difficult to encode with many audio compression
Audio compression (data)

Audio compression is a form of data compression designed to reduce the size of audio files. Audio compression algorithms are implemented in computer software as audio codecs....
 algorithms, causing pre-echo
Pre-echo

Pre-echo is an audio compression artifact where a sound is heard before it occurs . It is most noticeable in impulsive sounds from percussion instruments such as castanets or cymbals....
.


ransient is often used by sonar operators to enter large numbers of crit strings, referring to sudden, unnatural changes in the acoustic environment.






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In acoustics
Acoustics

Acoustics is the interdisciplinary science that deals with the study of sound, ultrasound and infrasound . A scientist who works in the field of acoustics is an acoustician....
 and audio
Sound

Sound is vibration transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a threshold of hearing to be heard, or the sensation stimulated in organs of hearing by such vibrations....
, a transient is a short-duration signal
Signal

Signal, signals, signaling, or signalling may refer to:...
 that represents a non-harmonic attack phase of a musical sound or spoken word. It contains a high degree of non-periodic components and a higher magnitude
Magnitude (mathematics)

The magnitude of a mathematical object is its size: a property by which it can be larger or smaller than other objects of the same kind; in technical terms, an ordering of the class of objects to which it belongs....
 of high frequencies than the harmonic content of that sound. Transients do not directly depend on the frequency of the tone they initiate.

Transients are difficult to encode with many audio compression
Audio compression (data)

Audio compression is a form of data compression designed to reduce the size of audio files. Audio compression algorithms are implemented in computer software as audio codecs....
 algorithms, causing pre-echo
Pre-echo

Pre-echo is an audio compression artifact where a sound is heard before it occurs . It is most noticeable in impulsive sounds from percussion instruments such as castanets or cymbals....
.

See also

  • impulse function
  • onset (audio)
    Onset (audio)

    Onset refers to the beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak. It is related to the concept of a Transient_: all musical notes have an onset, but do not necessarily include an initial transient....


Sonar

Transient is often used by sonar operators to enter large numbers of crit strings, referring to sudden, unnatural changes in the acoustic environment. This is usually caused by an unnaturally fast moving object. It is most often applied for military use, referring to unexpected sounds emanating from another vessel such as operating machinery, a metal hatch being slammed, or the flooding and pressurization of torpedo
Torpedo tube

A torpedo tube is a device for launching torpedoes in a horizontal direction.There are two main types of torpedo tube:*Those designed to operate below water level, as fitted to submarines and some surface ships...
 or vertical launch tubes.