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Low-Frequency Sound and Marine Mammals Current Knowledge and Research Needs (1994) / Chapter Skim
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APPENDIX A COMPARISON OF SOUND-PRESSURE REFERENCE LEVELS IN AIR AND WATER
Pages 63-64

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From page 63...
... Another is that, because the impedances of air and water differ, the actual power flow in them differs even if the pressures are the same. For example, a spherical sound source radiating a pressure of 1 dyne per square centimeter in air generates about 2.5 x 10-9 watts per square centimeter.
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From page 64...
... (dB re 20 pPa SPL) Threshold of human hearing [26]
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Key Terms

  • sound levels
  • airborne sounds
  • marine mammals
  • marine mammal
  • comparing sound

  • common reference
  • land mass
  • square meter
  • mammal sound
  • spherical sound

  • air generates
  • beluga echolocation
  • bracketed levels
  • nominal levels
  • absolute threshold

  • studying sound
  • sound source
  • sound frequency
  • ocs study
  • researchers studying

  • sea level
  • whale call
  • pressure level
  • air typically
  • reference level

  • seal threshold
  • alternate medium
  • human listener
  • atlantic ocs
  • mammal sounds


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