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Powering portable electronics using vocal fold vibrations

Cho, Hyunjun and Noh, Kyoohyun and Ishikawa, Tomohiro and Yang, Deajong and Sánchez-Sinencio, Edgar and Choo, Hyuck (2017) Powering portable electronics using vocal fold vibrations. In: IEEE 30th International Conference on Micro Electro Mechanical Systems. IEEE , Piscataway, NJ, pp. 217-220. ISBN 978-1-5090-5078-9.

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Using a multi-stacked array of vibration-driven energy harvesters and a custom-tailored energy-harvesting (EH) circuit, we have achieved stable 3.12-mW power generation at 5.5 Vdc from the acousto-mechanical vibrations of the human vocal folds at 75 dB and demonstrated its use as a practical on-demand power source for portable and wearable electronics. The voltage and power outputs over 3.7 Vdc and 1 mW necessary for charging lithium polymer (LiPo) batteries were accomplished using a 3D-printed packaging platform whose physical design and mechanical properties maximized the vibration transfer and effectively combined 10 or more individual energy harvesters into a compact unified stack. The custom-designed LC-resonant EH circuit efficiently converted raw AC output into DC. Using our EH device, we have successfully charged 100-mAh LiPo battery and operated a portable 2×16 LCD display (requiring 2.8 V, 10 mA).

Item Type:Book Section
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URLURL TypeDescription DOIArticle
Choo, Hyuck0000-0002-8903-7939
Additional Information:© 2017 IEEE. The project has been funded by the Caltech Innovation Funds, Heritage Medical Research Institute, and Caltech-GIST Collaborative Research Funds. A part of this work was supported by the Innovation-Creation Center for Advanced Interdisciplinary Research.
Group:Heritage Medical Research Institute
Funding AgencyGrant Number
Caltech Innovation Initiative (CI2)UNSPECIFIED
Heritage Medical Research InstituteUNSPECIFIED
Caltech-GIST Collaborative Research FundUNSPECIFIED
Innovation-Creation Center for Advanced Interdisciplinary ResearchUNSPECIFIED
Record Number:CaltechAUTHORS:20170302-124215445
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Official Citation:H. Cho, K. Noh, T. Ishikawa, D. Yang, E. Sánchez-Sinencio and H. Choo, "Powering portable electronics using vocal fold vibrations," 2017 IEEE 30th International Conference on Micro Electro Mechanical Systems (MEMS), Las Vegas, NV, USA, 2017, pp. 217-220. doi: 10.1109/MEMSYS.2017.7863379 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74667
Deposited By: Tony Diaz
Deposited On:02 Mar 2017 21:14
Last Modified:03 Oct 2019 16:41

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