Because sound is a transitory phenomenon and only able to be perceived subjectively by listeners, experimental phoneticians have several methods of making the sound permanent by displaying it in visual form. This makes objective measurement of phenomena within the soundwave possible, and removes the possibility of subjective error while making auditory judgements.
The commonest visual display we have in experimental phonetics is called the sound spectrogram. The display takes the form of a graph on a computer screen; for a more permanent record this graph can be transferred…
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Questions of Ethics in Computer Systems and their Future
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