Sound Propagation South of Martha's Vineyard.

• Main Author: Hecht,Richard J
• Other Authors: UNDERWATER SYSTEMS INC ROCKVILLE MD
• Format: Text
• Language: English
• Published: 1980
• Subjects: Acoustics; *SOUND TRANSMISSION; *UNDERWATER ACOUSTICS; EXPERIMENTAL DATA; EXPERIMENTAL DESIGN; GRAPHS; SIGNAL TO NOISE RATIO; SHALLOW WATER; CONTINENTAL SHELVES; SEISMIC WAVES; TABLES(DATA); ACOUSTIC ATTENUATION; HYDROPHONES; NORTH ATLANTIC OCEAN; LOW FREQUENCY; TRANSMISSION LOSS; UNDERWATER SOUND SIGNALS; GEOPHONES; Long Island; North Atlantic
• Online Access: http://www.dtic.mil/docs/citations/ADA091024; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA091024

An experiment was performed south of Martha's Vineyard, Massachusetts, on the Long Island platform using an embedded triaxial geophone and a colocated hydrophone as a receiver. The data shows low propagation loss even with a strong negative sound velocity gradient in the water. The signals from the embedded vertical geophone show 10 to 12 dB less apparent propagation loss than the signals from the hydrophone in the 30 to 200 Hz frequency band. At lower frequencies, signals from all four sensors were similar. (Author)