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July 1978

Clinical Rationale for Using an Overhead Speaker in Evaluation of Hearing Aids

Author Affiliations

From the Speech and Auditory Evaluation and Treatment Clinic, Department of Surgery, Letterman Army Medical Center, Presidio of San Francisco (Dr Mueller) and the San Francisco Hearing and Speech Center (Dr Sweetow).

Arch Otolaryngol. 1978;104(7):417-418. doi:10.1001/archotol.1978.00790070055014

• A variable that has received little attention in the psychoacoustic evaluation of the hearing aid is the position of loudspeakers with respect to the listener, particularly the azimuth of the loudspeaker, which is used for presenting the competing message. In the past, a variety of locations have been used, some of which can bias the outcome of the evaluation. For this reason, this article suggests the use of an overhead speaker to deliver the competing signal. The overhead placement provides a neutral location that is highly desirable for making reliable repeated speech performance comparisons. In addition, the overhead speaker can be easily adapted to the testing environment while it produces the effect of surrounding the listener with the competing signal.

(Arch Otolaryngol 104:417-418, 1978)

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