Auditory Effects of Mid-Frequency Sonars on Marine Mammals

Abstract

The long terms goals of this effort are to develop mathematical models to predict the auditory effects of mid-frequency tones, similar to those emitted by Navy tactical sonars, on marine mammals. The models would be used in acoustic effects analyses in environmental documents and to develop appropriate mitigation procedures. The objectives for FY07 were (1) to measure temporary threshold shift (TTS) in a bottlenose dolphin exposed to intermittent tones using both auditory evoked potential (AEP) and behavioral methods and (2) to evaluate the suitability of terrestrial mammal TTS models to fit the bottlenose dolphin TTS data. Prior effort established the growth and recovery of TTS after single, continuous exposures. The focus for FY07 was to examine the effects of multiple exposures and develop the capability of using AEP measurements for TTS.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2007
Accession Number
ADA506860

Entities

People

  • James J Finneran

Organizations

  • Naval Information Warfare Systems Command

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Computers
  • Detection
  • Electrophysiological Phenomena
  • Frequency
  • Hearing Disorders
  • Hearing Loss
  • Mammals
  • Marine Mammals
  • Mathematical Models
  • Measurement
  • Models
  • Naval Warfare
  • Navy
  • Predictive Modeling
  • Recovery
  • Sound Pressure
  • Steady State

Readers

  • Acoustical Oceanography.
  • Vision Science/Vision Psychology/Cognitive Neuroscience.