Action potential threshold elevation in the guinea-pig as a function of impact noise exposure energy

Jan Grenner, P Nilsson, H Sheppard, B Katbamna

Research output: Contribution to journalArticlepeer-review

Abstract

Eighteen groups of guinea pigs were exposed to a simulated impact noise for periods of 1.5-24 h. The peak level was kept constant at 131.5 dB and the repetition rate was varied to give seven different equivalent levels (Leq) between 96 and 117 dB. The auditory thresholds were assessed by electrocochleography after 1 month and compared with those of a control group. Significant damage occurred even at the lowest exposure energy used. When the total exposure energy was expressed on a decibel scale, the threshold elevation (1-10 kHz) increased 1.07 dB for each decibel increase in the exposure energy, regardless of the combination of Leq and exposure time. The results of the study thus support the equal-energy hypothesis under these conditions.
Original languageEnglish
Pages (from-to)356-366
JournalAudiology
Volume27
Issue number6
DOIs
Publication statusPublished - 1988

Subject classification (UKÄ)

  • Otorhinolaryngology

Free keywords

  • Impact noise
  • Threshold shift
  • Equal-energy hypothesis

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