Definition of Noise
Jae Ho Chang
jaeho at xs4all.nl
Thu Nov 19 17:36:28 EST 1998
What is a good definition of noise
in terms of acoustics (or maybe mathematics)
considering not only 'white noise' but also noise in general ?
What elements in a sound make us perceive the sound as a noise?
How do we describe such elements?
The keys are
a continuous spectrum without any peak ?
But in many cases, non-linearity or non-periodicity does not make the
sound noisy, but makes the sound as what it is supposed to be. Clarinet,
for example, makes a lot of non-linear or non-periodic fluctuation in its
reed at startup of vibration, but if we could cut it (after recording it)
the sound would not be perceived as a clarinet any more. Is this
non-linear and non-periodic vibration a noise ?
In fact, I need this for my thesis,
but I think this is quite interesting to talk about, too.
I would like to hear your opinion.
Jae Ho Chang :>
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