Article
Modification of otoacoustic emissions following ear-level exposure to MP3 player music
International Journal of Audiology
(2008)
Abstract
The purpose of this study was to examine if a pre-determined exposure level and duration of MP3 player music would result in significant changes in cochlear function when measured with audiometric and physiological methods. Distortion-product otoacoustic emissions (DPOAEs), synchronized spontaneous otoacoustic emissions (SSOAEs), and hearing thresholds were measured in 20 normal-hearing adults before and after a 30-minute MP3 player music exposure. DPOAEs were acquired with 65/45 dB SPL primary tones (f2=0.842–7.996 kHz) with a frequency resolution of 8 points/octave. A probe microphone system recorded ear-canal music levels and was used to equalize levels at approximately 85 dBC across individuals during the music presentation. Comparison of pre- and post-exposure measurements revealed no significant differences in hearing thresholds, but DPOAE levels in half-octave bands centered from 1.4–6.0 kHz were significantly reduced following the music exposure. Post-exposure shifts in SSOAE frequency and level were highly variable in individuals identified with SSOAEs. The results for the exposure conditions explored in this study indicate that changes in otoacoustic emissions may precede the development of music-induced hearing threshold shifts.
Keywords
- Music-induced hearing loss,
- Otoacoustic emissions,
- Sound pressure levels,
- Temporary threshold shift
Disciplines
Publication Date
December, 2008
DOI
10.1080/14992020802310879
Publisher Statement
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Citation Information
Shaum P. Bhagat and Anne M. Davis. "Modification of otoacoustic emissions following ear-level exposure to MP3 player music" International Journal of Audiology Vol. 47 Iss. 12 (2008) p. 751 - 760 ISSN: 1708-8186 Available at: http://works.bepress.com/shaum-bhagat/16/