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Dinosaur hearing, listening to muscle noise, quieter cubicles

ummer. Most of the vocalizations occurred from twilight to mid-morning. The fewest sounds occurred between the early evening and midnight. Following the paradigm that transients are most vocal when feeding, these results suggest that more feeding occurred at night when it is not possible to observe them visually. This acoustic information is a valuable supplement to traditional visual observations, and is shedding new light on the behavior of this still-mysterious class of killer whales. (3aAB4)

THE SOUNDSCAPE OF MODERNITY

Acoustical developments in the 20th century forever altered the sounds that U.S. residents heard and their ways of listening. Modern acoustical inventions such as sound meters, microphones, and reverberation equations brought about a new level of clarity and similarity in the acoustical environments of disparate locations from Boston concert halls to New York skyscrapers and Hollywood sound stages. Princeton's Emily Thompson (emilyt@princeton.edu), a technology historian, will explore the history of modern sound in early 20th-century United States. "While this new modern sound said little about the physical spaces in which it was produced," Thompson writes, "it has much to tell us about the culture that created it." (2pAAb1)

REHABILITATING THE WORLD'S WORST SOUNDS

Something that is very 21st century is the ability to gradually morph, or transform sounds from one to another. A variation of morphing is to transfer the features of one sound, say a cat's meow, to another sound, such as a musical instrument. Kelly Fitz of Starkey Hearing Research Center in Berkeley, Calif. (kelly_fitz@starkey.com) will describe the state of sound morphing, which can now be done with very good sound quality using modern signal processing techniques. As an illustrative demonstration, Fitz will transform some of the "world's wo
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Source:American Institute of Physics


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