Environmental Noise A Threat to Automatic Voice Analysis Research Article
Research Article  |   February 01, 1998
Environmental Noise
 
Author Affiliations & Notes
  • Dennis R-S Ingrisano
    University of Northern Colorado, Greeley
  • Cecyle K. Perry
    University of Wyoming, Laramie
  • Kairsten R. Jepson
    American Therapy Services, Casper, WY
  • Contact author: Dennis R-S Ingrisano, PhD, University of Northern Colorado, Greeley, CO 80639 Email: DIngrisa@HHS.UNCo.edu
Article Information
Hearing & Speech Perception / Acoustics / Speech, Voice & Prosody / Research Articles
Research Article   |   February 01, 1998
Environmental Noise
American Journal of Speech-Language Pathology, February 1998, Vol. 7, 91-96. doi:10.1044/1058-0360.0701.91
History: Received September 17, 1997 , Accepted November 26, 1997
 
American Journal of Speech-Language Pathology, February 1998, Vol. 7, 91-96. doi:10.1044/1058-0360.0701.91
History: Received September 17, 1997; Accepted November 26, 1997

The effects of environmental noise were estimated from automatic computer-assisted analyses of voice samples. Signals consisted of a live voice sample and a synthesized triangular waveform. Noise was generated from a personal computer fan. Six different A-weighted signal-to-noise [S/N(A)] conditions were created for the live voice and synthetic signal— 25, 20, 15, 10, 5, and 0 dB. Results revealed that automatic estimates were systematically affected by different S/N levels. As the noise floor increased, baseline estimates of jitter and shimmer also increased in value. Results are discussed with reference to safeguards and standards in voice recording and analysis.

Author Note
A portion of these data are from the thesis of Kairsten Jepson, completed at the University of Wyoming under the codirection of Dennis R-S Ingrisano and Cecyle K. Perry. The authors wish to acknowledge the thoughtful contributions of E. J. McDonald, University of Wyoming, and R. Steven Ackley, Gina Keene, Lisa Hernandez, and Gretchen Bell at the University of Northern Colorado. Part of this work was presented at the annual convention of the American Speech-Language-Hearing Association, Seattle, 1996.
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