Accession Number:

ADA193961

Title:

Acoustic Pressure Distribution on the Bottom of a Wedge-Shaped Ocean.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

• Li, Yu-Ming

Report Date:

1987-12-01

Pagination or Media Count:

102.0

Abstract:

The pressure amplitude distribution along the interface between a wedge-shaped fluid layer overlying fast and slow fluid bottoms were investigated using compute models based on the method of images. The pressure amplitude along the bottom rapidly falls off for distances closer to the apex than that at which adiabatic-mode theory predicts cut-off for the lowest mode. This distance is termed the dump distance for an acoustically fast-bottom condition. In the case of a slow bottom, because the speed of sound ratio is greater than 1, the dump distance does not exist. To facilitate scaling the acoustic fields, a scaling distance is introduced.

Descriptors:

• *SOUND PRESSURE
• *ACOUSTIC VELOCITY
• *UNDERWATER ACOUSTICS
• ACOUSTIC FIELDS
• COMPUTERIZED SIMULATION
• AMPLITUDE
• PRESSURE
• RANGE(DISTANCE)
• SCALING FACTOR
• OCEAN BOTTOM
• FLUIDS
• LAYERS
• WEDGES
• PRESSURE DISTRIBUTION
• AMPLITUDE
• OCEAN MODELS
• ACOUSTIC ABSORPTION
• SLOPE
• SOUND TRANSMISSION
• HIGH VELOCITY
• COMPUTER PROGRAMS
• THESES

Subject Categories:

• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE