Accession Number:

ADA183052

Title:

Spreading Loss and Attenuation in Classical Physics: Lessons from Underwater Acoustics

Descriptive Note:

Technical document

Corporate Author:

NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT

Personal Author(s):

• Browning, David G.
• Scully-Power, Paul D.

Report Date:

1987-06-26

Pagination or Media Count:

17.0

Abstract:

All classical wave propagation is characterized by spreading loss and attenuation of the medium. Although initially high, the rate of spreading loss decreases rapidly with range while the rate of attenuation remains constant. In underwater acoustics, it has been found that when the attenuation loss becomes dominant a curtain effect can exist resulting in rapidly increasing propagation loss. A mathematical expression for this condition is derived. Author Keywords Charts Graphs.

Descriptors:

• *TRANSMISSION LOSS
• *UNDERWATER ACOUSTICS
• ACOUSTIC ATTENUATION
• DATA REDUCTION
• DISPERSING
• GRAPHS
• MATHEMATICS
• WAVE EQUATIONS
• WAVE PROPAGATION

Subject Categories:

• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE