

Author: Rostolland D.
Publisher: S. Hirzel Verlag
ISSN: 1610-1928
Source: Acta Acustica united with Acustica, Vol.50, Iss.2, 1982-02, pp. : 118-125
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Abstract
A study of acoustic differences between spoken and shouted voice was realized on French dissyllabic words. Mean power of male spoken voice, which is about 40 μW, rises up to 28000 μW in shouting. Spectrum of shouted voice shows concentration of sound energy in the most sensitive zone of hearing. The laryngeal frequency increases strongly in shouting and it increases more for low- than for high-pitched voices. Duration of shouted vowels is much longer, particularly in final position (+67%). Duration of shouted consonants is reduced by 20%. The total radiated energy per word in shouted voice is about 7000 times as strong as in spoken voice. These results suggest a noticeable adaptation of hearing and speech production, since everything contributes to increase the voice compass (produced and perceived intensity). The increase in amount of energy involves, however, a reduction of quality in speech sound production.
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