Examination of the Cros Type Hearing Aid This study was designed to examine the CROS type hearing aid under a number of listening conditions, both advantageous and disadvantageous, in order to determine whether the relative merits of the instrument could be demonstrated in the laboratory. CNC word lists were presented against a background of cafeteria noise to ... Research Article
Research Article  |   June 01, 1971
Examination of the Cros Type Hearing Aid
 
Author Affiliations & Notes
  • Stephen H. Lotterman
    Veterans Administration Hospital, Washington, D.C.
  • Roger N. Kasten
    Veterans Administration Hospital, Washington, D.C.
Article Information
Research Articles
Research Article   |   June 01, 1971
Examination of the Cros Type Hearing Aid
Journal of Speech, Language, and Hearing Research, June 1971, Vol. 14, 416-420. doi:10.1044/jshr.1402.416
History: Received December 15, 1969
 
Journal of Speech, Language, and Hearing Research, June 1971, Vol. 14, 416-420. doi:10.1044/jshr.1402.416
History: Received December 15, 1969

This study was designed to examine the CROS type hearing aid under a number of listening conditions, both advantageous and disadvantageous, in order to determine whether the relative merits of the instrument could be demonstrated in the laboratory. CNC word lists were presented against a background of cafeteria noise to evaluate the performance of 20 unilaterally impaired subjects under five unaided and five aided listening conditions. Speech intelligibility scores obtained under the experimental conditions were converted to deterioration scores relative to better ear discrimination in quiet. Deterioration of unaided speech scores ranged from 14% under the most favorable listening condition to 58% under the least favorable condition. Deterioration of aided scores ranged from a low of 20% to a high of 39%. The results suggest that while the CROS hearing aid enhances intelligibility under favorable use conditions, it degrades speech intelligibility in some demanding situations.

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