Compression in the Time Domain High input levels can cause saturation and "fast pumping" effects in hearing aids. The resulting distortion products and changes in speech amplitude envelope are examined in the time domain. Spectrograms reveal changes in speech elements not apparent with time domain methods. ... Short Course
Short Course  |   July 01, 1993
Compression in the Time Domain
 
Author Affiliations & Notes
  • Harry Teder
    Telex Communications, Inc., 9600 Aldrich Avenue South, Minneapolis, MN 55420
Article Information
Hearing Aids, Cochlear Implants & Assistive Technology / Speech, Voice & Prosody / Short Courses
Short Course   |   July 01, 1993
Compression in the Time Domain
American Journal of Audiology, July 1993, Vol. 2, 41-46. doi:10.1044/1059-0889.0202.41
History: Received February 18, 1993 , Accepted March 22, 1993
 
American Journal of Audiology, July 1993, Vol. 2, 41-46. doi:10.1044/1059-0889.0202.41
History: Received February 18, 1993; Accepted March 22, 1993

High input levels can cause saturation and "fast pumping" effects in hearing aids. The resulting distortion products and changes in speech amplitude envelope are examined in the time domain. Spectrograms reveal changes in speech elements not apparent with time domain methods.

Acknowledgments
Adaptive Compression® is a registered trademark of Telex Communications Inc. Hypersignal® is a registered trademark of Hyperception Inc. K-Amp® is a registered trademark of Etymotic Design Inc.
I want to thank my associates Steve Hanke and Art Johnson for the many hours spent on data collection and analysis, the animated discussions, and the hard-won insights into the unexpected complexities of nonlinear amplification.
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