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AP threshold elevation in the guinea pig following exposure to a broadband noise

Grenner, Jan LU ; Nilsson, Per and Katbamna, Bharti (1989) In Journal of the Acoustical Society of America 86(6). p.2223-2228
Abstract
Sixty guinea pigs were exposed to a steady-state broadband noise with a falling frequency spectrum. The sound-pressure level was varied between 96 and 117 dB SPL, and the duration of the exposure was varied from 3 to 12 h. After 4-5 weeks, the auditory thresholds were determined by electrocochleography at 14 frequencies, and the results were compared with a control group. With increasing sound-pressure level, the thresholds became elevated at all frequencies. The maximum threshold elevation also exhibited a slight shift toward higher frequencies. With increasing exposure time, the threshold elevations increased and shifted into the high-frequency region, whereas the low-frequency region was less affected. Linear regression analysis showed... (More)
Sixty guinea pigs were exposed to a steady-state broadband noise with a falling frequency spectrum. The sound-pressure level was varied between 96 and 117 dB SPL, and the duration of the exposure was varied from 3 to 12 h. After 4-5 weeks, the auditory thresholds were determined by electrocochleography at 14 frequencies, and the results were compared with a control group. With increasing sound-pressure level, the thresholds became elevated at all frequencies. The maximum threshold elevation also exhibited a slight shift toward higher frequencies. With increasing exposure time, the threshold elevations increased and shifted into the high-frequency region, whereas the low-frequency region was less affected. Linear regression analysis showed that the average threshold elevation between 1 and 20 kHz did not deviate from that predicted by the equal-energy hypothesis. However, the high-frequency loss at 5-20 kHz was very dependent on the exposure time, whereas the 1- to 4-kHz loss was not. There was no sign of any critical intensity with sudden increments in threshold elevation. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Acoustical Society of America
volume
86
issue
6
pages
2223 - 2228
publisher
American Institute of Physics
external identifiers
  • pmid:2600311
  • scopus:0024789774
ISSN
1520-8524
DOI
10.1121/1.398483
language
English
LU publication?
yes
id
e64e9b64-03d8-428e-bebd-f577ea678ad0 (old id 1104592)
date added to LUP
2008-08-06 11:29:07
date last changed
2017-01-01 07:15:13
@article{e64e9b64-03d8-428e-bebd-f577ea678ad0,
  abstract     = {Sixty guinea pigs were exposed to a steady-state broadband noise with a falling frequency spectrum. The sound-pressure level was varied between 96 and 117 dB SPL, and the duration of the exposure was varied from 3 to 12 h. After 4-5 weeks, the auditory thresholds were determined by electrocochleography at 14 frequencies, and the results were compared with a control group. With increasing sound-pressure level, the thresholds became elevated at all frequencies. The maximum threshold elevation also exhibited a slight shift toward higher frequencies. With increasing exposure time, the threshold elevations increased and shifted into the high-frequency region, whereas the low-frequency region was less affected. Linear regression analysis showed that the average threshold elevation between 1 and 20 kHz did not deviate from that predicted by the equal-energy hypothesis. However, the high-frequency loss at 5-20 kHz was very dependent on the exposure time, whereas the 1- to 4-kHz loss was not. There was no sign of any critical intensity with sudden increments in threshold elevation.},
  author       = {Grenner, Jan and Nilsson, Per and Katbamna, Bharti},
  issn         = {1520-8524},
  language     = {eng},
  number       = {6},
  pages        = {2223--2228},
  publisher    = {American Institute of Physics},
  series       = {Journal of the Acoustical Society of America},
  title        = {AP threshold elevation in the guinea pig following exposure to a broadband noise},
  url          = {http://dx.doi.org/10.1121/1.398483},
  volume       = {86},
  year         = {1989},
}