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Latest Sound localization Stories

Alligator Sound Perception Comes From Air-Filled Canals Between Their Ears
2014-03-28 09:21:20

Brett Smith for redOrbit.com - Your Universe Online For an animal without external ears, alligators have a strong sense of directional hearing and a new study published on Wednesday in the Journal of Experimental Biology has revealed that the reptiles’ refined hearing is a result of large, air-filled canals connecting two middle ears. "Mammals usually have large moveable ears, but alligators do not, so they have solved the problems of sound localization a little differently,” said...

2014-03-26 23:01:16

A University of Maryland-led team of biologists shows that alligators can keenly detect the direction of sounds because of large, air-filled channels connecting the two middle ears. Birds have a similar configuration and the mechanism probably originated with archosaurs, the shared ancestors of modern crocodilians and birds. College Park, Md (PRWEB) March 26, 2014 By reptile standards, alligators are positively chatty. They are the most vocal of the non-avian reptiles and are known to be...

New Hearing Aid Design Inspired By Parasitic Fly Ear
2013-05-31 15:37:12

Lee Rannals for redOrbit.com - Your Universe Online A parasitic fly has inspired scientists to create a new type of microphone that achieves better acoustical performance than what is currently available in hearing aids. Scientists will be presenting results at the 21st annual International Congress on Acoustics in Montreal next week about how an unpresuming little fly called Ormia ochracea inspired their research. The house-fly-sized insect has eardrums that sense sound pressure and...

Bionic Ears for the deaf
2012-09-21 10:21:44

Connie K. Ho for redOrbit.com — Your Universe Online Researchers from the Stanley Steyer School of Health Professions at Tel Aviv University (TAU) and The Hearing, Speech, and the Language Center at Sheba Medical Center recently noted that bilateral cochlear implants could possibly improve binaural sound processing in the brain. Cochlear implants, sometimes known as bionic ears, have been used since the end of the 1980 as electronic devices in both ear lobes. They were created to...

2010-08-26 16:47:27

University of Oregon researchers say auditory neurons just simply process that first strong signal Voices carry, reflect off objects and create echoes. Most people rarely hear the echoes; instead they only process the first sound received. For the hard of hearing, though, being in an acoustically challenging room can be a problem. For them, echoes carry. Ever listen to a lecture recorded in a large room? That most people only process the first-arriving sound is not new. Physicist Joseph...

2010-07-01 11:10:37

Animals can locate the source of a sound by detecting microsecond (one millionth of a second) differences in arrival time at their two ears. New York University researchers have identified a mechanism the brain uses to help process sound localization. This group of scientists found that one reason these neurons are able to perform such a rapid and sensitive computation is because they are extremely responsive to the input's "rise time""”the time it takes to reach the peak of the...

2010-04-29 12:49:17

Dominance Hierarchy of Auditory Spatial Cues in Barn Owls Background: Barn owls integrate spatial information across frequency channels to localize sounds in space. Methodology/Principal Findings: We presented barn owls with synchronous sounds that contained different bands of frequencies (3-5 kHz and 7-9 kHz) from different locations in space. When the owls were confronted with the conflicting localization cues from two synchronous sounds of equal level, their orienting responses were...

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2009-06-12 08:04:48

The world is a perilous place for the endangered manatee. While the mammals are at risk from natural threats, human activity also poses a great danger to manatee numbers. Debborah Colbert, from the Association of Zoos and Aquariums, explains that many manatees die and are seriously injured in collisions with boats every year. However, little is known about how manatees perceive their environment. Whether they can localize sounds, and specifically whether they can tell which direction a boat...

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2008-01-14 08:50:00

Recognizing people, objects or animals by the sound they make is an important survival skill and something most of us take for granted. But very similar objects can physically make very dissimilar sounds and we are able to pick up subtle clues about the identity and source of the sound. Scientists funded by the Biotechnology and Biological Sciences Research Council (BBSRC) are working out how the human ear and the brain come together to help us understand our acoustic environment. They have...


Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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