In:
Journal of Speech, Language, and Hearing Research, American Speech Language Hearing Association, Vol. 60, No. 9 ( 2017-09-18), p. 2379-2393
Abstract:
Recently, efforts have been made to investigate the vocal tract using magnetic resonance imaging (MRI). Due to technical limitations, teeth were omitted in many previous studies on vocal tract acoustics. However, the knowledge of how teeth influence vocal tract acoustics might be important in order to estimate the necessity of implementing teeth in vocal tract models. The aim of this study was therefore to estimate the effect of teeth on vocal tract acoustics. Method The acoustic properties of 18 solid (3-dimensional printed) vocal tract models without teeth were compared to the same 18 models including teeth in terms of resonance frequencies ( f Rn ). The f Rn were obtained from the transfer functions of these models excited by white noise at the glottis level. The models were derived from MRI data of 2 trained singers performing 3 different vowel conditions (/i/, /a/, and /u/) in speech and low-pitched and high-pitched singing. Results Depending on the oral configuration, models exhibiting side cavities or side branches were characterized by major changes in the transfer function when teeth were implemented via the introduction of pole-zero pairs. Conclusions To avoid errors in modeling, teeth should be included in 3-dimensional vocal tract models for acoustic evaluation. Supplemental Material https://doi.org/10.23641/asha.5386771
Type of Medium:
Online Resource
ISSN:
1092-4388
,
1558-9102
DOI:
10.1044/2017_JSLHR-S-16-0395
Language:
English
Publisher:
American Speech Language Hearing Association
Publication Date:
2017
detail.hit.zdb_id:
2070420-3
SSG:
5,2
SSG:
7,11
