Restoration of speech following total larynx removal is an integral part of the treatment plan for many patients with laryngeal cancer. This project is concerned with both fundamental and highly practical aspects of the speech restoration process. One broad objective of the proposed research is to expand current knowledge about acoustic characteristics of alaryngeal speech.
Three specific aims of the initial phase of the project are (1) to complete detailed analyses of the acoustic properties of volume velocity functions of the voicing sources of esophageal and tracheoesophageal speakers, (2) to identify acoustic properties that differentiate voicing source outputs of normal, esophageal, and tracheoesophageal speakers, (3) to quantify neck tissue coupling and transmission properties underlying the use of neck-type artificial larynges.
Specific aims of a second phase of the project are to complete detailed analyses of important articulatory-based acoustic properties of alaryngeal speech; namely, to delineate acoustic properties of vowels produced by tracheoesophageal speakers. In a third phase of this project, the aim is to develop a computer simulated LPC analysis-synthesis system for use initially by laryngectomized patients. The long-term goal of this phase of the project is to successfully incorporate new speech analysis and synthesis techniques into a variety of prosthetic devices or speech aids that alaryngeal and other types of communicatively impaired individuals can use to enhance oral communication.

National Institute of Health (NIH)
National Institute on Deafness and Other Communication Disorders (NIDCD)
First Independent Research Support & Transition (FIRST) Awards (R29)
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Sensory Disorders and Language Study Section (CMS)
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University of Arizona
Schools of Arts and Sciences
United States
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Qi, Y; Hillman, R E (1997) Temporal and spectral estimations of harmonics-to-noise ratio in human voice signals. J Acoust Soc Am 102:537-43
Qi, Y; Weinberg, B (1995) Characteristics of voicing source waveforms produced by esophageal and tracheoesophageal speakers. J Speech Hear Res 38:536-48
Qi, Y; Weinberg, B; Bi, N (1995) Enhancement of female esophageal and tracheoesophageal speech. J Acoust Soc Am 98:2461-5
Qi, Y; Weinberg, B; Bi, N et al. (1995) Minimizing the effect of period determination on the computation of amplitude perturbation in voice. J Acoust Soc Am 97:2525-32
Qi, Y; Weinberg, B (1994) A homomorphic method for measuring secondary amplitude modulation. J Speech Hear Res 37:800-5
Qi, Y; Bi, N (1994) A simplified approximation of the four-parameter LF model of voice source. J Acoust Soc Am 96:1182-5
Qi, Y (1992) Time normalization in voice analysis. J Acoust Soc Am 92:2569-76