Well, according to the Acoustical Society of America, a parasitic fly called Ormia ochracea, which is native to the Southeast United States and Central America, has ears that sense sound pressure--much like human ears do.
Ronald Miles, a professor of engineering at Binghamton University, and his team, studied the way this tiny fly could target sounds coming from different directions.
They designed a microphone small enough for a hearing aid that does the same--pivoting inside the ear in response tro changing sound pressure.
Of course, this took a ton of tinkering--the creative part. That, and saying, "Hey, I think that fly is listening to that guy over there--what a great idea for a hearing aid."
The paper will be presented at the 21st International Congress on Acoustics in Montreal June 2-7.
For more...check out: http://www.newswise.com/articles/view/603695/?sc=dwhn.
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If this is for some stupid black market pill, you are not being very creative..