This research component addresses issues of perceptual significance of normal and pathologic speech and voice qualities. The qualities are based on the following acoustic or physiological variables: (1) degrees of oral- nasal coupling, (2) open- and speed-quotients of glottal source waveform, (3) short-term perturbation of fundamental frequency, resonance frequency and amplitude, and (5) widening and narrowing of the epilarynx/pharynx. In particular, it aims at (1) delineating physiologic and acoustic variables important for perceived vocal qualities using sustained vowels and connected speech, both synthetically and naturally produced, and (2) investigating auditory capabilities to discriminate vocal qualities. Auditory capabilities will be investigated for three groups of listeners, i.e., speech pathologists/scientists, naive listeners, and trained singers. Evaluating perceptual and acoustical analysis methodologies is a secondary purpose of the investigation. Data generated from these synthesized stimuli, because they are free from many extraneous within and between- subject variables inherent in naturally produced voices, will not only clarify critical physiologic conditions responsible for associated vocal qualities but also delineate listeners' capabilities to detect and differentiate various degrees of perceived qualities. Use of the different psychophysical methods allows comparative evaluation of quality judgment procedures as they relate to auditory capabilities and clinical practices. The synthesized speech (both sustained vowels and connected speech) and limited amount of naturally produced voice samples will be submitted to comprehensive acoustical analysis programs which include spectral correlation/eigenvector analysis and dynamical/fractal analysis. The purpose of the acoustical analysis is to furture delineate acoustic correlates of perceived voice qualities and to verify and evaluate these analysis techniques.

Project Start
Project End
Budget Start
Budget End
Support Year
2
Fiscal Year
1991
Total Cost
Indirect Cost
Name
University of Iowa
Department
Type
DUNS #
041294109
City
Iowa City
State
IA
Country
United States
Zip Code
52242
Palmer, Phyllis M; Jaffe, Debra M; McCulloch, Timothy M et al. (2008) Quantitative contributions of the muscles of the tongue, floor-of-mouth, jaw, and velum to tongue-to-palate pressure generation. J Speech Lang Hear Res 51:828-35
Robin, Donald A; Jacks, Adam; Hageman, Carlin et al. (2008) Visuomotor tracking abilities of speakers with apraxia of speech or conduction aphasia. Brain Lang 106:98-106
Ballard, K J; Robin, D A (2007) Influence of continual biofeedback on jaw pursuit-tracking in healthy adults and in adults with apraxia plus aphasia. J Mot Behav 39:19-28
Luschei, Erich S; Ramig, Lorraine O; Finnegan, Eileen M et al. (2006) Patterns of laryngeal electromyography and the activity of the respiratory system during spontaneous laughter. J Neurophysiol 96:442-50
Solomon, Nancy Pearl; Robin, Donald A (2005) Perceptions of effort during handgrip and tongue elevation in Parkinson's disease. Parkinsonism Relat Disord 11:353-61
Kuehn, David P; Moon, Jerald B (2005) Histologic study of intravelar structures in normal human adult specimens. Cleft Palate Craniofac J 42:481-9
Solomon, Nancy Pearl (2004) Assessment of tongue weakness and fatigue. Int J Orofacial Myology 30:8-19
Ramig, Lorraine Olson; Fox, Cynthia; Sapir, Shimon (2004) Parkinson's disease: speech and voice disorders and their treatment with the Lee Silverman Voice Treatment. Semin Speech Lang 25:169-80
Ritchie, Justine M; Smith, Elaine M; Summersgill, Kurt F et al. (2003) Human papillomavirus infection as a prognostic factor in carcinomas of the oral cavity and oropharynx. Int J Cancer 104:336-44
Finnegan, Eileen M; Luschei, Erich S; Barkmeier, Julie M et al. (2003) Synchrony of laryngeal muscle activity in persons with vocal tremor. Arch Otolaryngol Head Neck Surg 129:313-8

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