Measurement of attack-Release Times in Compression Hearing Aids A system for measurement of attack-release times in hearing aids with automatic-gain-control circuitry is described, with a view toward implementing that portion of the ANSI S3.22-1976 Standard in which parameters for these measurements are specified. Signal generation is accomplished by using a phased-array loudspeaker arrangement designed to produce transient-free pulsed ... Research Article
Research Article  |   June 01, 1978
Measurement of attack-Release Times in Compression Hearing Aids
 
Author Affiliations & Notes
  • Jerry L. Punch
    University of Maryland, College Park
  • William F. Lawrence
    University of Maryland, College Park
  • G. Donald Causey
    University of Maryland, College Park
Article Information
Research Articles
Research Article   |   June 01, 1978
Measurement of attack-Release Times in Compression Hearing Aids
Journal of Speech, Language, and Hearing Research, June 1978, Vol. 21, 338-349. doi:10.1044/jshr.2102.338
History: Received February 23, 1977 , Accepted September 10, 1977
 
Journal of Speech, Language, and Hearing Research, June 1978, Vol. 21, 338-349. doi:10.1044/jshr.2102.338
History: Received February 23, 1977; Accepted September 10, 1977

A system for measurement of attack-release times in hearing aids with automatic-gain-control circuitry is described, with a view toward implementing that portion of the ANSI S3.22-1976 Standard in which parameters for these measurements are specified. Signal generation is accomplished by using a phased-array loudspeaker arrangement designed to produce transient-free pulsed acoustic sinusoids. Output waveforms are captured by a commercial transient recorder, and are displayed in either an oscilloscopic or graphic mode. A specific means of calculating attack and release times is recommended whereby variously shaped output waveforms are amenable to the basic protocol outlined in the ANSI Standard.

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