Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Effects of intense pure tones on auditory temporal acuity.

Authors
Champlin-CA
Source
Department of Speech-Language-Hearing, University of Kansas, Lawrence, Kansas 1987 Jan; :1-121
Link
NIOSHTIC No.
00182996
Abstract
Attempts were made to study subtle, temporary changes in auditory temporal acuity (ATA) brought about by listening to intense sounds for a brief period of time. The study group consisted of five normal hearing young adults. The frequency of the sounds used was either 0.4 kilohertz (kHz) or 1.7kHz. A gap detection threshold (GDT) procedure was used to measure ATA before and after exposure. The physical parameters of the exposure tones were selected to induce three levels of temporary threshold shifts (TTS) over a limited frequency range. GDTs obtained under certain stimulus conditions following the 1.7kHz exposure were larger than those obtained prior to the exposure. These postexposure effects, however, paralleled changes in absolute threshold suggesting that changes in ATA are simply a manifestation of elevated absolute thresholds. Evidence was presented which supported this theory: only low level stimulus conditions produced significant shifts in GDT; GDT shift magnitude was correlated with the size of the TTS; in the absence of TTS, no significant changes in GDT were observed; and recovery times for shifts in GDT and absolute threshold were similar. GDT changes were not totally explained by absolute threshold shifts. Evidence was presented which suggested that temporal acuity and absolute sensitivity were both affected by the low frequency exposure. The authors recommend that both temporal acuity and absolute sensitivity measurements be undertaken when evaluations are made of the effects of low frequency exposures.
Keywords
NIOSH-Grant; Noise-induced-hearing-loss; Noise-exposure; Hearing-threshold; Humans
Contact
Speech-Lang-Hear:scis/dsorders University of Kansas 290 Haworth Hall Lawrence, Kans 66045
Publication Date
19870101
Document Type
Final Grant Report
Funding Amount
40910
Funding Type
Grant
Fiscal Year
1987
NTIS Accession No.
PB89-129902
NTIS Price
A07
Identifying No.
Grant-Number-R03-OH-02141
NIOSH Division
OEP
Priority Area
Noise-induced-hearing-loss
Source Name
Department of Speech-Language-Hearing, University of Kansas, Lawrence, Kansas
State
KS
Performing Organization
University of Kansas Lawrence, Lawrence, Kansas
TOP