The Resource Effects of low-frequency water-borne sound on divers : open water trial, C.C. Steevens ; R. Sylvester ; J. Clark, (electronic resource)

Effects of low-frequency water-borne sound on divers : open water trial, C.C. Steevens ; R. Sylvester ; J. Clark, (electronic resource)

Label
Effects of low-frequency water-borne sound on divers : open water trial
Title
Effects of low-frequency water-borne sound on divers
Title remainder
open water trial
Statement of responsibility
C.C. Steevens ; R. Sylvester ; J. Clark
Creator
Contributor
Subject
Language
eng
Summary
Navy divers may be exposed to active sonar transmissions while underwater. Previous manned experiments to determine safe levels of exposure have all been conducted in enclosed settings characterized by standing wave sound fields. The purpose of this experiment was to determine if plane wave (open water) acoustics alters the physiological or subjective responses of exposed divers compared to standing wave exposures. 54 manned exposures to two low-frequency underwater acoustic signals were performed at depths of 30 and 60 feet in a fresh water spring. Two projectors were used to create a plane progressive traveling acoustic wave. Divers were exposed in both helmeted and unhelmeted diving rigs. Effects on hearing, vestibular function, cardiac rhythm, and a key-insertion task were measured. Subjective responses were also recorded. In addition, the effects of neoprene wet suits on sound attenuation were measured. Slight decrements in hearing acuity were detected, but these results were confounded by circumstances unrelated to the underwater sound exposures, such as ear squeezes from diving, and microphone feedback noise. No adverse effects in vestibular function, cardiac rhythm, or key insertion performance were detected. Subjective responses revealed that divers were moderately annoyed by the underwater sound, but overall found the exposures tolerable. Neoprene wet suits generally act to attenuate low-frequency sound exposures, but under certain circumstances may also accentuate a sound exposure, possibly through a resonance effect. There is no indication from the results of this study that low-frequency water-borne sound exposures in the open water present any additional risk to divers compared to similar exposures in enclosed environments
Member of
Cataloging source
DTICE
http://library.link/vocab/creatorName
Steevens, C. C
Funding information
Naval Medical Research and Development Command
Government publication
federal national government publication
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
http://library.link/vocab/relatedWorkOrContributorName
  • Sylvester, R
  • Clark, J
  • United States
  • Naval Submarine Medical Research Laboratory
Series statement
Naval Submarine Medical Research Laboratory report
Series volume
no. 1208
http://library.link/vocab/subjectName
  • Underwater physiology
  • Sonar
  • Divers
  • Submarine medicine
  • Marine Engineering
  • Rockets
  • Acoustics
  • Underwater acoustics
  • Divers
  • Underwater sound
  • Diving
  • Open water
  • Functions
  • Risk
  • Exposure(general)
  • Naval personnel
  • Acoustic waves
  • Fresh water
  • Response
  • Feedback
  • Resonance
  • Physiological effects
  • Sound
  • Safety
  • Adverse conditions
  • Acoustics
  • Noise
  • Acoustic attenuation
  • Response(biology)
  • Microphones
  • Sonar
  • Low frequency
  • Plane waves
  • Traveling waves
  • Sonar signals
  • Manned
  • Heart
  • Hearing
  • Vestibular apparatus
  • Ear
  • Springs
  • Breathing apparatus
  • Auditory acuity
  • Neoprene
  • Standing waves
  • Waterborne
  • Biological rhythms
  • Wet suits
Label
Effects of low-frequency water-borne sound on divers : open water trial, C.C. Steevens ; R. Sylvester ; J. Clark, (electronic resource)
Link
Instantiates
Publication
Note
  • Titl from title screen (viewed Sept. 5, 2012)
  • "Space and Naval Systems Warfare Command Task."
  • "7 OCTOBER 1997."
Bibliography note
Includes bibliographical references (p. 26-28)
Extent
1 online resource (73 p.)
Form of item
online
Governing access note
APPROVED FOR PUBLIC RELEASE
Other physical details
ill.
Specific material designation
remote
System control number
  • 4051959-01okla_normanlaw
  • (SIRSI)4051959
  • (Sirsi) o227857712
  • (GPO)99384119
Label
Effects of low-frequency water-borne sound on divers : open water trial, C.C. Steevens ; R. Sylvester ; J. Clark, (electronic resource)
Link
Publication
Note
  • Titl from title screen (viewed Sept. 5, 2012)
  • "Space and Naval Systems Warfare Command Task."
  • "7 OCTOBER 1997."
Bibliography note
Includes bibliographical references (p. 26-28)
Extent
1 online resource (73 p.)
Form of item
online
Governing access note
APPROVED FOR PUBLIC RELEASE
Other physical details
ill.
Specific material designation
remote
System control number
  • 4051959-01okla_normanlaw
  • (SIRSI)4051959
  • (Sirsi) o227857712
  • (GPO)99384119

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