Graphene-based microphone mimics bat's ultrasound

Park Sae-jin Reporter() | Posted : July 20, 2015, 16:12 | Updated : July 20, 2015, 16:12
A group of researchers with the University of California at Berkeley have developed a microphone and a speaker that can pick up and emit ultrasound like bats and dolphins do with their unique communication system.

In achieving the goal - enabling humans to hear and talk through thick objects and underwater, the U.S. team used a material known as graphene, instead of the more traditional ones like paper and plastic.

Bats and dolphins emit sounds at very high frequency and at much longer range than the human ear can detect and can locate objects and communicate using these pulsating sounds.

Dr. Qin Zhou, a postdoctoral student at UC Berkeley's physics department, told Xinhua news agency that the idea had been studied for a long time, but the technology was not available until graphene use was common. Zhou was a member of the research team led by the study's senior author Alex Zettl to work on the device.

By Ruchi Singh
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