Research Notes  |   September 1988
Some Theoretical Considerations concerning the Relation between Functional Gain and Insertion Gain
 
Author Notes
  • © 1988, American Speech-Language-Hearing Association
Article Information
Research Notes   |   September 1988
Some Theoretical Considerations concerning the Relation between Functional Gain and Insertion Gain
Journal of Speech, Language, and Hearing Research, September 1988, Vol. 31, 491-496. doi:10.1044/jshr.3103.491
History: Received June 26, 1987 , Accepted October 28, 1987
 
Journal of Speech, Language, and Hearing Research, September 1988, Vol. 31, 491-496. doi:10.1044/jshr.3103.491
History: Received June 26, 1987; Accepted October 28, 1987

Three examples in which insertion gain and functional gain measures of hearing aid response do not agree are illustrated. In two of the cases, functional gain measures overestimate the true real-ear gain for average conversational speech and in the third example, insertion gain measures are shown to provide an inaccurate estimate of aided benefit. Reasons for these discrepancies are discussed, and an alternative method for measuring real-ear hearing-aid response is described.

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