Graphene has extremely low mass density and high mechanical strength, key qualities for efficient wide-frequency-response electrostatic audio speaker design. Low mass ensures good high frequency response, while high strength allows for relatively large free-standing diaphragms necessary for effective low frequency response. Here we report on construction and testing of a miniaturized graphene-based electrostatic audio transducer. The speaker/earphone is straightforward in design and operation and has excellent frequency response across the entire audio frequency range (20HZ - 20kHz), with performance matching or surpassing commercially available audio earphones.
Cite
@article{arxiv.1303.2391,
title = {Electrostatic Graphene Loudspeaker},
author = {Qin Zhou and A. Zettl},
journal= {arXiv preprint arXiv:1303.2391},
year = {2013}
}