Measurement & Inversion of Acoustic Emission from Ice - Mechanical Processes in the Arctic.

• Main Authors: Von Der Heydt, Keith, Scheer, Edward K.
• Other Authors: WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF APPLIED OCEAN PHYSICS AND ENGINEERING
• Format: Text
• Language: English
• Published: 1998
• Subjects: Acoustics; *ICE; *ACOUSTIC EMISSIONS; *ARCTIC REGIONS; COMPUTER PROGRAMS; MECHANICAL PROPERTIES; REAL TIME; BEAM FORMING; DATA ACQUISITION; TELEMETER SYSTEMS; PACK ICE; Arctic; Sea ice
• Online Access: http://www.dtic.mil/docs/citations/ADA343245; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA343245

This project was in cooperation with investigators Schmidt and Baggeroer at the Massachusetts Institute of Technology for the period 1 January 1991 through 30 June 1996. The project was part of the Sea Ice Mechanics Initiative. Our focus was on the development of instrumentation and techniques for making seismo-acoustic measurements of ice crack events in the Arctic pack ice. Specialized autonomous data acquisition equipment with an emphasis on dynamic range and radio LAN telemetry was designed and manufactured. There was special emphasis on developing realtime beamforming and graphical display software for use in the field. WHOI personnel participated in two extensive field programs, one in the Fall of 1993 and another the following Spring. Data acquired during these experiments was subsequently the focus of processing and analysis efforts through the end of the grant period.