Measurement of the acoustic transfer function of the vocal tract: a fast and accurate method.  

Oleh:

Badin, P. ; Perrier, P. ; Djeradi, A. ; Guerin, B.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Journal of Phonetics vol. 19 no. 3/4 (Jul. 1991), page 387 - 396.

Ketersediaan

Perpustakaan PKBB Nomor Panggil: 405/JOP/19 Non-tandon: tidak ada Tandon: 3

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Isi artikel

Knowledge of vocal tract acoustic transfer functions is important for the understanding of phenomena occurring during speech production. We present here a new measurement method based on the external excitation of the vocal tract with a known pseudo-random sequence, where the transfer function is obtained as the FFT of the cross-correlation between the sequence and the signal measured at the lips. The advantages of this method over methods based on sweep-tones or white noise excitation are (1) a much shorter measurement time (about 100 ms), (2) the possibility of speech sound production during the measurement, and (3) a more accurate definition of bandwidths. This method has been checked against classical methods through systematic comparisons on a small corpus of vowels and fricative consonants. Moreover, it has been verified that simultaneous speech sound production does not perturb significantly the measurements. This method should thus be a very helpful tool for the investigation of the acoustic properties of the vocal tract in various cases such as vowels, fricatives and nasals.

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