Researchers from the University of Texas Austin have developed a prototype microphone device that mimics the Ormia ochracea fly’s hearing mechanism. The animal that inspired the design can pinpoint the location of a chirping cricket with remarkable accuracy because of its acute hearing, which relies upon a sophisticated sound processing mechanism. The 2-millimeter-wide sensor uses piezoelectric materials, which turns mechanical strain from sounds into electric signals. The use of these materials means that the device requires very little power. Inspired by previous work, the researchers built a miniature pressure sensitive structure in silicon that has a flexible beam and integrated piezoelectric materials. The structure simultaneously measures two vibration modes, which allows for the replication of the fly’s special ability to detect sound direction.
Source: EurekAlert
