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Sound research at acoustical society meeting
Date:10/18/2011

rk University, and Malcolm Longair, a physics professor at the University of Cambridge. "We built a filter for the churches' acoustics as they would have existed in the 16th century," explains Boren. "Then we can record a choir singing in an anechoic chamber, with no sound reflections, and put it through the filter to hear the choir as it would have sounded during the Renaissance." The presentation 1aAA6, "Acoustic simulation of Renaissance Venetian churches," is in the morning session of Monday, Oct. 31.

Abstract: http://asa.aip.org/web2/asa/abstracts/search.oct11/asa6.html

Unexploded ordnance detected via low-frequency acoustics: Many bodies of water around the globe contain discarded and unexploded munitions, a.k.a. "underwater ordnance" or "UXOs." These UXOs, most commonly associated with former military training sites or the result of post-war disposal, pose public safety hazards as well as chemical contamination risks. Cleanup requires being able to locate and differentiate engineered objects from natural ones. Aubrey Espaa, a research associate in the Acoustics Department of the University of Washington's Applied Physics Laboratory, and colleagues are working on a way to do just that, thanks to low-frequency acoustics. Sound is a particularly useful tool for classifying objects either on or embedded in the ocean floor. "Low-frequency sound has the advantage of being able to excite specific vibrations of an object of interest, which in turn results in re-radiation of sound back to the observer," explains Espaa. "This scattered sound is used to generate an acoustic template or fingerprint of the object, which can aid in distinguishing between man-made and natural objects." According to Espaa, the research not only aims to generate acoustic fingerprints for various objects, but also to understand the physics behind what we see in the acoustic fingerprint such as how sound co
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Contact: Charles E. Blue
cblue@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

Page: 1 2 3 4 5 6 7 8 9 10 11

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