Accession Number:

ADA193232

Title:

Vertical Directionality of Ambient Noise at 32 deg N as a Function of Longitude.

Descriptive Note:

Technical memo.,

Corporate Author:

SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB

Personal Author(s):

• Hodgkiss, W. S.
• Fisher, F. H.

Report Date:

1988-01-01

Pagination or Media Count:

127.0

Abstract:

Measurements have been made of the ambient noise field between 25 and 300 Hz with vertical arrays at 32 N 124 W, 136 W, and 150 W. Substantial differences in the vertical distribution of noise have been measured, especially at the higher frequencies which can be interpreted in the context of attenuation by seawater sound absorption of coastal shipping. Due to substantial differences in weather at the stations, these measurements also provide an opportunity to observe the effect of weather on the vertical distribution of ambient noise.

Descriptors:

• *OCEANOGRAPHIC DATA
• *EXPERIMENTAL DATA
• *UNDERWATER ACOUSTICS
• ACOUSTIC ABSORPTION
• ACOUSTIC FIELDS
• AMBIENT NOISE
• COASTAL REGIONS
• DIRECTIONAL
• DISTRIBUTION
• SEA WATER
• SHIPPING
• VERTICAL ORIENTATION
• WEATHER
• WEATHER STATIONS
• NORTH PACIFIC OCEAN
• ACOUSTIC ATTENUATION
• SHIP NOISE
• WIND VELOCITY
• SEA STATES

Subject Categories:

• Acoustics
• Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE