Diotic Loudness Summation in Normal and Impaired Hearing Diotic loudness summation at 500 and 2000 Hz was measured in 10 normal-hearing and 10 cochlear-impaired listeners. Diotic stimuli were matched in loudness to monaural "standards" of 70, 80, and 90 dB SPL. Diotic loudness summation averaged about 9 dB at 500 Hz for both groups. At 2000 Hz, the ... Research Article
Research Article  |   September 01, 1985
Diotic Loudness Summation in Normal and Impaired Hearing
 
Author Affiliations & Notes
  • Joseph W. Hall
    Northwestern University, Chicago, IL
  • Antony D.G. Harvey
    MRC Institute of Hearing Research, University of Nottingham, Nottingham, U.K.
Article Information
Research Articles
Research Article   |   September 01, 1985
Diotic Loudness Summation in Normal and Impaired Hearing
Journal of Speech, Language, and Hearing Research, September 1985, Vol. 28, 445-448. doi:10.1044/jshr.2803.448
History: Received October 22, 1984 , Accepted May 13, 1985
 
Journal of Speech, Language, and Hearing Research, September 1985, Vol. 28, 445-448. doi:10.1044/jshr.2803.448
History: Received October 22, 1984; Accepted May 13, 1985

Diotic loudness summation at 500 and 2000 Hz was measured in 10 normal-hearing and 10 cochlear-impaired listeners. Diotic stimuli were matched in loudness to monaural "standards" of 70, 80, and 90 dB SPL. Diotic loudness summation averaged about 9 dB at 500 Hz for both groups. At 2000 Hz, the hearing-impaired listeners showed reduced diotic loudness summation at the 70- and 80-dB levels, but showed normal diotic loudness summation (about 9 dB) at the 90-dB level. The results indicate that diotic loudness summation is normal in cochlear-impaired ears, provided that the stimuli are presented sufficiently above threshold.

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