24 Jun '11, 1pm

Underwater microphone innovation inspired by the design of the orca whale’s ear

24 Jun 2011: New Underwater Microphone Inspired By the Design of Orca Whale’s Ear Stanford University researchers say they have developed an underwater microphone, using technology inspired in part by the ears of an orca whale, that is capable of capturing sound frequencies across a span of 17 octaves even at high-pressure depths. While existing underwater microphones typically have Stanford Stanford’s underwater microphone limited range because of the variations in background pressure that become increasingly intense at greater depths, the Stanford team found that allowing water into the microphone maintains equal pressure on each side of the membrane, regardless of depth. Their ultimate design uses a pea-sized instrument that is able to damp the extent to which its membrane moves in response to any sound wave that strikes it. Noting the connection to orcas, Onur Kilic, a...

Full article: http://e360.yale.edu/digest/underwater_microphone_innovat...

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