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- The distribution of effective sound pressures or intensities
measured as a function of frequency in specified frequency bands.
- (a) Description, for a function of time, of the resolution
of a signal into components, each of different frequency and (usually) different
amplitude and phase. (b) "Spectrum" is also used to signify a continuous range
of components, usually wide in extent, within which waves have some specified
common characteristic; e.g., "audio frequency spectrum."
Source:
Glossary of Terms
in Noise Control Engineering
- A signal’s resolution expressed in component frequencies or fractional octave
bands.
Source:
http://www.volpe.dot.gov/acoustics/docs/1990-1999/1999-1.pdf
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the
distribution of the energy of a signal with frequency.
Source:
http://www.owenscorning.com/around/sound/glossary.asp
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