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. 2018 Aug 3;4(8):eaas8772. doi: 10.1126/sciadv.aas8772

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Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

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Fig. 5 — (A) Schematic of a wearable NM microphone device. (B) Transparent NM microphone placed over the “UNIST” logo, illustrating its transparent and unobtrusive appearance. Scale bar, 1 cm. (C) Sensing measurement system for the NM microphone. Variation in the output voltages as a function of (D) sound frequency and (E) SPL for the NM microphone and the thin-film microphone. (F) Waveform and short-time FFT (STFT) signals of original sound (“There’s plenty of room at the bottom”; left) extracted by the sound wave analyzer, the signal read from the NM-based microphone (middle), and the thin-film microphone (right).