Author： Kusch H.
Publisher： S. Hirzel Verlag
ISSN： 1610-1928
Source： Acta Acustica united with Acustica, Vol.25, Iss.1, 1971-07, pp. : 42-46
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Abstract
At great depths beneath the surface of the ocean only a helium atmosphere can be used for respiration. Since such an atmosphere has a considerably increased velocity of sound, the spoken word becomes unintelligible.An on-line method is proposed which processes the spoken information in such a way that intelligibility is re-established. The method makes use of the fact that a sound is characterised by a segment which is repeated several times. Each second segment is selected by means of a computer and dilated in time. The output waveform is the sequence of the dilated segments. A prototype apparatus is presented which converts speech distorted by the helium atmosphere into an intelligible form.
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