First Advisor

Alamander Hicks

Term of Graduation

Spring 1979

Date of Publication

5-11-1979

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Speech Communication: Speech and Hearing Sciences

Department

Speech Communication

Language

English

Subjects

Speech perception -- Testing, Bone, Speech audiometry

DOI

10.15760/etd.2784

Physical Description

1 online resource (vi, 39 pages)

Abstract

The purpose of this study was to investigate the effects of increased intensity on the bone conducted speech discrimination ability of normal listeners utilizing standard audiological equipment. The NU-6 word lists were utilized to test the bone conducted speech discrimination skills of ten normal hearing subjects, 21 to 30 years of age, on standard clinical equipment. Both the hearing levels (dB HL) and the sensation levels (dB SL) of the test administration were considered. In general, it was recommended that 100 dB Hl is the most appropriate dial setting for the administration of bone conducted speech discrimination tests even though comparable speech discrimination scores may be obtained with a 95 dB HL dial setting. This study indicates that the most appropriate sensation levels for the administration of bone conducted speech discrimination tests are 55 and 60 dB SL. Most normal listeners can be expected to achieve a 55 dB sensation level at the limits of the speech audiometer (100 dB HL). Additionally, it was found that when bone conducted speech discrimination tests are administered at levels of less than 55 dB SL, the results may be compromised by variances that occurred in this normal hearing sample. Therefore, the clinical audiologist should accept bone conducted speech discrimination results as valid only when the scores obtained at 40, 45 and 50 dB sensation levels are within the limits of clinical normality (90% or better).

Recommendations for further research are discussed.

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Persistent Identifier

http://archives.pdx.edu/ds/psu/17089

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