Relationship of Auditory Distortion Test Results to Speech Discrimination Through Flat vs. Selective Amplifying Systems Thirty adult subjects with high frequency hearing loss were given speech discrimination tests under conditions of flat and selective amplification. It was hypothesized that performance for the two amplifying conditions is related to amount of distortion in the auditory system as defined by selected clinical tests. An assumption was made ... Research Article
Research Article  |   September 01, 1969
Relationship of Auditory Distortion Test Results to Speech Discrimination Through Flat vs. Selective Amplifying Systems
 
Author Affiliations & Notes
  • Gary Thompson
    University of Washington, Seattle, Washington
  • Frank Lassman
    University of Minnesota, Minneapolis, Minnesota
Article Information
Research Articles
Research Article   |   September 01, 1969
Relationship of Auditory Distortion Test Results to Speech Discrimination Through Flat vs. Selective Amplifying Systems
Journal of Speech, Language, and Hearing Research, September 1969, Vol. 12, 594-606. doi:10.1044/jshr.1203.594
History: Received June 20, 1968
 
Journal of Speech, Language, and Hearing Research, September 1969, Vol. 12, 594-606. doi:10.1044/jshr.1203.594
History: Received June 20, 1968

Thirty adult subjects with high frequency hearing loss were given speech discrimination tests under conditions of flat and selective amplification. It was hypothesized that performance for the two amplifying conditions is related to amount of distortion in the auditory system as defined by selected clinical tests. An assumption was made that excessively distorted auditory systems are more easily overdriven by high frequency emphasis amplification than auditory systems with less distortion. Therefore, subjects with least distortion were expected to discriminate speech better through a high-pass filtered amplifying system which, within limits, restored frequency-intensity balance. Results indicated slightly better speech discrimination performance for the selective amplifying condition. There was some evidence that the extent of the difference favoring selective amplification may be influenced by the amount of distortion in the auditory system.

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