Accession Number:

ADA067137

Title:

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

Descriptive Note:

Corporate Author:

NAVAL UNDERSEA RESEARCH AND DEVELOPMENT CENTER SAN DIEGO CALIF

Personal Author(s):

Report Date:

1971-12-01

Pagination or Media Count:

32.0

Abstract:

Samples of ambient sea noise at depths from 100 to 2240 meters were recorded from a single sensor suspended from NUCs 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 13 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

Descriptors:

• *OCEANOGRAPHIC DATA
• *AMBIENT NOISE
• *UNDERWATER ACOUSTICS
• SIGNAL TO NOISE RATIO
• DEPTH
• HYDROPHONES
• PACIFIC OCEAN
• AIR WATER INTERACTIONS
• SOUND PRESSURE
• DEEP OCEANS

Subject Categories:

• Physical and Dynamic Oceanography
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE