First Advisor

Thomas Dolan

Date of Publication

2003

Document Type

Thesis

Degree Name

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

Department

Speech and Hearing Sciences

Language

English

Subjects

Hearing -- Physiological aspects, Ototoxic agents, Audiometry, Otoacoustic emissions

DOI

10.15760/etd.1688

Physical Description

1 online resource (v, 39 pages) : illustrations

Abstract

Previous studies show that pure tone thresholds are strongly correlated with distortion product otoacoustic emission amplitudes when evaluating the frequency range from 1 to 8 kHz (Avan & Bonfils, 1993). Little is known about correlations between these two measures at higher frequencies from 9-16 kHz. This study compared pure tone thresholds and distortion product otoacoustic emissions (DPOAEs) in this high frequency range for 29 normal hearing subjects ages 18-30. Pure tone thresholds were obtained at 250-16 kHz and distortion product otoacoustic emissions (DPOAE) 2,211-17,675 were measured in the same ears. DPOAE amplitudes were measured using a constant F1/F2 ratio of 1.2, with F2 values ranging from 2,211-17,675 Hz. Data obtained from 50 ears showed a decline in DPOAE amplitude with increasing frequency of the F1 and F2 primary stimulus tones. Behavioral thresholds demonstrated an increase with increasing frequency of the pure tone stimulus. Pearson r-correlation analysis demonstrated a weak relationship between measures. Further investigation revealed that equipment variables prevented accurate readings.

Rights

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Comments

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Persistent Identifier

http://archives.pdx.edu/ds/psu/11154

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