Effects of Noise and Tonal Stimuli on Hearing in Pinnipeds

Abstract

The practical objective for FY08 was to complete behavioral testing with three subjects against an equal energy matrix of tonal noise exposures (with similar characteristics to mid-frequency sonar) based on pre-determined combinations of stimulus duration and received sound pressure level. The specific aims were (1) to compare the characteristics of the threshold shifts induced by exposure to tonal sounds to the auditory effects induced by broadband noise exposure so that the effects of mid-frequency tonal noise could be incorporated into existing models of TTS for the amphibious pinnipeds, and (2) to evaluate differential auditory responses to waterborne versus airborne sound in order to determine whether the hearing losses incurred in one physical medium translate to equivalent losses the other.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2008
Accession Number
ADA505197

Entities

People

  • Colleen Reichmuth

Organizations

  • University of California, Santa Cruz

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Absorption
  • Anatomy
  • Animals
  • Broadband
  • California
  • Environment
  • Frequency
  • Hearing Loss
  • Mammals
  • Marine Mammals
  • Measurement
  • Oceanography
  • Pinnipeds
  • Recovery
  • Sea Lions
  • Sensitivity
  • Sound Pressure

Readers

  • Acoustics.
  • Computational Modeling and Simulation