Graphene Electrostatic Microphone

ORAL

Abstract

We demonstrate a wideband electrostatic graphene microphone displaying flat frequency response over the entire human audible region as well as into the ultrasonic regime. Using the microphone, low-level ultrasonic bat calls are successfully recorded. The microphone can be paired with a similarly constructed electrostatic graphene loudspeaker to create a wideband ultrasonic radio.

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Authors

  • Qin Zhou

    Department of Physics, University of California, Berkeley, CA 94720, USA, Department of Physics, University of California - Berkeley

  • Seita Onishi

    Department of Physics, University of California, Berkeley, CA 94720, USA, Department of Physics, University of California - Berkeley

  • Alex Zettl

    Dept. of Physics, Univ of California - Berkeley; Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley;, Physics Department, COINS, UC Berkeley. Kavli Energy NanoSciences Institute, UC Berkeley, Materials Science Division, Lawrence Berkeley National Lab, UC Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory, Kavli Energy NanoSciences Institute at UC Berkeley, Department of Physics, University of California - Berkeley, UC Berkeley, Department of Physics, University of California at Berkeley; Materials Sciences Division, Lawrence Berkeley National Laboratory