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The two principal sources of sound in speech, voicing and frication, occur simultaneously in voiced fricatives as well as at the vowel-fricative boundary in phonologically voiceless fricatives. Instead of simply overlapping, the two sources interact. This paper is an acoustic study of one such interaction effect: the amplitude modulation of the frication(More)
1. ABSTRACT This paper investigates the acoustic effects of source interaction in fricative speech sounds. A range of parameters has been employed, including a measure designed specifically to describe quantitatively the amplitude modulation of frication noise by voicing, a phenomenon which has mainly been qualitatively reported. The signal processing(More)
The two distinct sound sources comprising voiced frication, voicing and frication, interact. One effect is that the periodic source at the glottis modulates the amplitude of the frica-tion source originating in the vocal tract above the constriction. Voicing strength and modulation depth for frication noise were measured for sustained English voiced(More)
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