Transfer Characteristics of Vocal Tract Closed by Mask Cavity

• Autorzy: Vojnović M. , Mijić M. , Šumarac Pavlović D.

Identyfikatory

DOI

10.24425/122378

• Języki publikacji: EN

Abstrakty

EN

This paper analyses the changes in transfer characteristics of the vocal tract when closed by a mask, i.e. a chamber. The analysis was performed in two ways: by analytical estimation and by measurements in the vocal tract physical model for the case of mask with inner volume V = 430 cm³, corresponding to the oxygen masks used in combat airplanes. It was shown that closing the vocal tract with a mask cavity increases the first formant frequency by about 10% in front and high vowels (/e/, /i/, and /u/) and the frequencies of the first two formants by about 5% in the remaining two vowels (/a/ and /o/). It was also revealed that longitudinal and transversal resonances in the mask chamber can lead to errors in the recognition of the vowel formant frequencies. The results point to the need for additional knowledge about resonances in mask application.

Słowa kluczowe

EN

mask; transfer characteristics; vocal tract

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2018
• Tom: Vol. 43, No. 2
• Strony: 307--311
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr.

Twórcy

autor

Vojnović M.

• Life Activities Advancement Center, Gospodar Jovanova 35, 11000 Belgrade, Serbia

autor

Mijić M.

• School of Electrical Engineering, Bulevar kralja Aleksandra 73, 11000 Belgrade, Serbia

autor

Šumarac Pavlović D.

• School of Electrical Engineering, Bulevar kralja Aleksandra 73, 11000 Belgrade, Serbia

Bibliografia

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• 10. Vojnović M., Mijić M. (1997), The influence of the oxygen mask on long-time spectra of continuous speech, Journal of the Acoustical Society of America, 102, 4, 2456-2458.
• 11. Vojnović M., Mijić M. (2005), An improved model for the acoustic radiation impedance of the mouth based on an equivalent electrical network, Applied Acoustics, 66, 481-499.
• 12. Vojnović M., Mijić M., Šumarac Pavlović D. (2017), A simplified model of mouth radiation impedance closed by mask cavity, Applied Acoustics, 115, 3-5.
• 13. Wang G.-Y., Zhao C.-Y., Xue X.-Z., Zhang J., Zhao X.-Q. (2016), Correction of distortion mask speech based on parameter estimation of AR model, International Conference on Audio, Language and Image Processing, 689-693.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).