Ambient Sea Noise Measured from 100 to 2240 Meter Depths at Locations Approximately 200 Nautical Miles West of San Diego.

Abstract

Samples of ambient sea noise at depths from 100 to 2240 meters were recorded from a single sensor suspended from NUC's SONODIVER and the spectral level as a function of hydrophone depth was analyzed. These noise data were analyzed from 8 Hz to 5 K Hz in 1/3 octave bands. Within a stable period of sea noise data, with minimal transient effects, 5 integrations of 2 minutes each were averaged. Examples of the noise spectra at various depths are shown. In general, these data show a decrease in sound pressure spectrum level with increase in depth. Signal - to - noise versus depth is the real objective, of course, but this will follow in later reports. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1971
Accession Number
ADA067137

Tags

Communities of Interest

  • Autonomy
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Acquisition
  • Ambient Noise
  • Control Systems
  • Data Acquisition
  • Deep Oceans
  • Detectors
  • Explosions
  • Frequency
  • Hydrophones
  • Measurement
  • Nautical
  • Noise
  • Oceans
  • Recording Systems
  • Sound Pressure
  • Spectra
  • Vehicles

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Oceanography.
  • Plasma Physics.