Electronic phase shift measurement for the determination of acoustic wave DOA using single MEMS biomimetic sensor

Abstract MEMS acoustic sensors have been developed to mimic the highly-accurate sound-locating system of the Ormia ochracea fly, which detects sound wavelengths much larger than its hearing organ. A typical ormia-based MEMS directional sound sensor possesses two coupled wings that vibrate in respons...

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Autores principales:	Renato C. Rabelo, Fabio D. Alves, Gamani Karunasiri
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4eaa3d504c0744c2bca1556d83dbacad
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spelling	oai:doaj.org-article:4eaa3d504c0744c2bca1556d83dbacad2021-12-02T16:06:39ZElectronic phase shift measurement for the determination of acoustic wave DOA using single MEMS biomimetic sensor10.1038/s41598-020-69563-12045-2322https://doaj.org/article/4eaa3d504c0744c2bca1556d83dbacad2020-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-69563-1https://doaj.org/toc/2045-2322Abstract MEMS acoustic sensors have been developed to mimic the highly-accurate sound-locating system of the Ormia ochracea fly, which detects sound wavelengths much larger than its hearing organ. A typical ormia-based MEMS directional sound sensor possesses two coupled wings that vibrate in response to sound according to a superposition of its two main resonant modes, rocking and bending. Vibrations are transduced into electronic signals by interdigitated comb finger capacitors at each wing’s end along with a capacitance measuring circuitry. A sensor designed to exhibit resonant modes closely placed in frequency, enhancing their coupling, was operated with a closed cavity behind the wings. Simultaneous and independent measurements of electronic signals generated at each of the single sensor wings were used to determine incident sound direction of arrival (DOA). DOA was found proportional to the phase shift between them and to the difference over the sum of their amplitudes as well. Single sensor phase shift DOA measurement presented a resolution better than 3° for sound pressure levels of 25 mPa or greater. These results indicate that a single sensor operating in closed-cavity configuration can provide hemispherical unambiguous direction of arrival of sound waves which wavelength is much larger than the sensor size.Renato C. RabeloFabio D. AlvesGamani KarunasiriNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-13 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Renato C. Rabelo Fabio D. Alves Gamani Karunasiri Electronic phase shift measurement for the determination of acoustic wave DOA using single MEMS biomimetic sensor
description	Abstract MEMS acoustic sensors have been developed to mimic the highly-accurate sound-locating system of the Ormia ochracea fly, which detects sound wavelengths much larger than its hearing organ. A typical ormia-based MEMS directional sound sensor possesses two coupled wings that vibrate in response to sound according to a superposition of its two main resonant modes, rocking and bending. Vibrations are transduced into electronic signals by interdigitated comb finger capacitors at each wing’s end along with a capacitance measuring circuitry. A sensor designed to exhibit resonant modes closely placed in frequency, enhancing their coupling, was operated with a closed cavity behind the wings. Simultaneous and independent measurements of electronic signals generated at each of the single sensor wings were used to determine incident sound direction of arrival (DOA). DOA was found proportional to the phase shift between them and to the difference over the sum of their amplitudes as well. Single sensor phase shift DOA measurement presented a resolution better than 3° for sound pressure levels of 25 mPa or greater. These results indicate that a single sensor operating in closed-cavity configuration can provide hemispherical unambiguous direction of arrival of sound waves which wavelength is much larger than the sensor size.
format	article
author	Renato C. Rabelo Fabio D. Alves Gamani Karunasiri
author_facet	Renato C. Rabelo Fabio D. Alves Gamani Karunasiri
author_sort	Renato C. Rabelo
title	Electronic phase shift measurement for the determination of acoustic wave DOA using single MEMS biomimetic sensor
title_short	Electronic phase shift measurement for the determination of acoustic wave DOA using single MEMS biomimetic sensor
title_full	Electronic phase shift measurement for the determination of acoustic wave DOA using single MEMS biomimetic sensor
title_fullStr	Electronic phase shift measurement for the determination of acoustic wave DOA using single MEMS biomimetic sensor
title_full_unstemmed	Electronic phase shift measurement for the determination of acoustic wave DOA using single MEMS biomimetic sensor
title_sort	electronic phase shift measurement for the determination of acoustic wave doa using single mems biomimetic sensor
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/4eaa3d504c0744c2bca1556d83dbacad
work_keys_str_mv	AT renatocrabelo electronicphaseshiftmeasurementforthedeterminationofacousticwavedoausingsinglememsbiomimeticsensor AT fabiodalves electronicphaseshiftmeasurementforthedeterminationofacousticwavedoausingsinglememsbiomimeticsensor AT gamanikarunasiri electronicphaseshiftmeasurementforthedeterminationofacousticwavedoausingsinglememsbiomimeticsensor
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Electronic phase shift measurement for the determination of acoustic wave DOA using single MEMS biomimetic sensor

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