Acoustic Comparison of Physical Vocal Tract Models with Hard and Soft Walls. Birkholz, P., Häsner, P., & Kürbis, S. In ICASSP 2022 - 2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pages 8242–8246. ISSN: 2379-190Xdoi abstract bibtex This study explored how the frequencies and bandwidths of the acoustic resonances of physical tube models of the vocal tract differ when they have hard versus soft walls. For each of 10 tube shapes representing different vowels, two physical models were made: one with rigid plastic walls, and one with soft silicone walls. For all models, the acoustic transfer functions were measured and the bandwidths and frequencies of the first three resonances were determined. For the models with soft walls, the resonance frequencies and bandwidths below 2 kHz were consistently higher than for the models with hard walls. These results confirm the general predictions of mathematical lumped-element models for the mechanical impedance of the vocal tract walls. The resonance bandwidths of the silicone models were well within the range of 50–90 Hz measured for humans, while they were too small for the rigid tubes below 2 kHz.
@inproceedings{birkholz_acoustic_2022,
title = {Acoustic Comparison of Physical Vocal Tract Models with Hard and Soft Walls},
doi = {10.1109/ICASSP43922.2022.9746611},
abstract = {This study explored how the frequencies and bandwidths of the acoustic resonances of physical tube models of the vocal tract differ when they have hard versus soft walls. For each of 10 tube shapes representing different vowels, two physical models were made: one with rigid plastic walls, and one with soft silicone walls. For all models, the acoustic transfer functions were measured and the bandwidths and frequencies of the first three resonances were determined. For the models with soft walls, the resonance frequencies and bandwidths below 2 {kHz} were consistently higher than for the models with hard walls. These results confirm the general predictions of mathematical lumped-element models for the mechanical impedance of the vocal tract walls. The resonance bandwidths of the silicone models were well within the range of 50–90 Hz measured for humans, while they were too small for the rigid tubes below 2 {kHz}.},
eventtitle = {{ICASSP} 2022 - 2022 {IEEE} International Conference on Acoustics, Speech and Signal Processing ({ICASSP})},
pages = {8242--8246},
booktitle = {{ICASSP} 2022 - 2022 {IEEE} International Conference on Acoustics, Speech and Signal Processing ({ICASSP})},
author = {Birkholz, P. and Häsner, P. and Kürbis, S.},
date = {2022-05},
note = {{ISSN}: 2379-190X},
keywords = {Acoustic measurements, acoustic resonances, Acoustics, Bandwidth, Computational modeling, Mathematical models, Resonant frequency, transfer function measurement, Transfer functions, Vocal tract walls},
file = {IEEE Xplore Abstract Record:files/107/stamp.html:text/html;IEEE Xplore Full Text PDF:files/106/Birkholz et al. - 2022 - Acoustic Comparison of Physical Vocal Tract Models.pdf:application/pdf},
}
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