Definition of Pre-echo
In audio signal processing, pre-echo, is a digital audio compression artifact where in the reconstructed signal (following an encoding/decoding cycle), a sound is heard before it occurs in the original signal (hence the name). It is most noticeable in sharp impulsive sounds (transients) from percussion instruments such as castanets or cymbals.
Terms mentioned above
Related terms
Transient (acoustics)
In acoustics and audio, a transient is a high amplitude, short-duration sound at the…
Echo
In audio signal processing and acoustics, an echo is a reflection of sound that arrives…
Auditory masking
In audio signal processing, auditory masking occurs when the perception of one sound is…
Sonar signal processing
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Insert (effects processing)
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Headroom (audio signal processing)
In digital and analog audio, headroom refers to the amount by which the signal-handling…
Sweet spot (acoustics)
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Line level
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Pure tone
In psychoacoustics and signal processing, a pure tone is a sound or other signal with a…
Further reading
- Anechoic and Reverberation Rooms · Wikibooks: Acoustics
- Anechoic Tiling · Wikibooks: Engineering Acoustics
- Echolocation in Bats and Dolphins · Wikibooks: Engineering Acoustics
Frequently asked questions
What is Pre-echo?
In audio signal processing, pre-echo, is a digital audio compression artifact where in the reconstructed signal (following an encoding/decoding cycle), a sound is heard before it occurs in the original signal (hence the name).