Project CANUS: Sound Propagation and Reverberation Measurement in Hudson Bay.

• Main Author: Browning,David G.
• Other Authors: NAVAL UNDERWATER SYSTEMS CENTER NEWPORT R I
• Format: Text
• Language: English
• Published: 1971
• Subjects: Physical and Dynamic Oceanography; Non-electrical Energy Conversion; (*UNDERWATER SOUND; HUDSON BAY); (*HUDSON BAY; ACOUSTIC PROPERTIES); REVERBERATION; EXPLOSIVE CHARGES; DETONATIONS; SHALLOW WATER; AUDIO FREQUENCY; Most project-2; Hudson Bay; Hudson; Coats Island; Cape Churchill
• Online Access: http://www.dtic.mil/docs/citations/AD0736155; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0736155

An experiment was conducted in Hudson Bay during August 1970 to obtain propagation and reverberation data below 12kHz. A listening hydeophone was suspended from an Amphibian stationed 90 miles east of Cape Churchill. Explosive charges were dropped from an aircraft along a 270-mile track to Coats Island. Additional charges were detonated close to hydrophone to obtain the reverberation data. BT information from along the propagation track indicated a sound channel with an axial depth of 80 feet over a flat hard bottom at an average depth of 425 feet. Propagation loss curves were obtained for 1/3-octave bands from 300 to 5000 Hz and reverberation levels for 1-octave bands from 200 to 12,800 Hz. (Author)