Accession Number:
AD0869978
Title:
Propagation of High-Intensity, Low-Frequency Sound without Loss
Descriptive Note:
Technical rept.
Corporate Author:
ARMY MOBILITY EQUIPMENT RESEARCH AND DEVELOPMENT COMMAND FORT BELVOIR VA
Personal Author(s):
Report Date:
1970-04-01
Pagination or Media Count:
54.0
Abstract:
This report describes a research program on sound propagation conducted under the In-house Laboratory Independent Research program. The objective of this work was to develop a concept to transmit high-intensity, low- frequency sound over a distance without large losses of sound-pressure level. An arbitrary goal of reducing the normal inverse square propagation law by 50 percent was chosen and achieved in the regions tested. A hyperbolic lens and hemispherical reflector were developed and tested for directivity improvement.
Descriptors:
Subject Categories:
- Acoustics