First Advisor

Thomas G. Dolan

Term of Graduation

Spring 1989

Date of Publication

5-4-1989

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Speech Communication

Department

Speech Communication

Language

English

Subjects

Hearing aids

DOI

10.15760/etd.5797

Physical Description

1 online resource (2, vii, 86 pages)

Abstract

This study examined the frequency response characteristics of three behind-the-ear hearing aids alone and in combination with three FM auditory trainers. The hearing aids and FM auditory trainers were coupled using two different methods: direct audio input and personal mini-loop. Also, two different gain control settings were used. Frequency responses were evaluated using a template method specified in ANSI S3.22 1982 standards. A larger percentage of the personal mini-loop combinations failed to meet this ANSI standard as compared to the direct audio input combinations (72.3% vs. 50%). The frequency response curves for various combinations of hearing aids and FM auditory trainers were also separated into high and low frequency bands. Significant changes in output were found for the low frequency region, and these changes were dependent upon the coupling method. Specifically, the personal mini-loop tended to produce a significant reduction in output in the low frequency band as compared to that of the hearing aid alone. The use of direct audio input resulted in a significant increase in output in the low frequency band as compared to that of the hearing aid alone. This latter method produced the best overall agreement with the hearing aid frequency response, especially when the FM auditory trainer was set at full on gain and the hearing aid at a low gain setting.

Rights

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Comments

A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Speech Communication with emphasis in Audiology.

If you are the rightful copyright holder of this dissertation or thesis and wish to have it removed from the Open Access Collection, please submit a request to pdxscholar@pdx.edu and include clear identification of the work, preferably with URL.

Persistent Identifier

https://archives.pdx.edu/ds/psu/21970

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