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Acoustic Wave Sensor - Europe PMC

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Last Updated: 25 November 2022

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A wave-confining metasphere beamforming acoustic sensor for superior human-machine voice interaction.

Using a compact sensor, it is a common challenge to omnidirectionally track sound sources under a hypersensitive rate with low noise contamination. Here, we present a unibody acoustic metamaterial spherical shell with equidistant defected piezoelectric cavities, also known as the metasphere beam forming acoustic sensor. Moreover, the MBAS-based auditory system is demonstrated for high-quality audio cloning, source localization, and speech recognition in a noisy environment lacking any signal enhancement, revealing its versatile applications in a variety of voice interaction devices.

Source link: https://europepmc.org/article/MED/36170358


Impedance Analysis of Chitin Nanofibers Integrated Bulk Acoustic Wave Humidity Sensor with Asymmetric Electrode Configuration.

This paper produced a high-performance chitin nanofibers embedded in a bulk acoustic wave humidity sensor with a symmetric electrode arrangement. Next, the prospect of the ChNFs-integrated asymmetric n-m electrode QCM humidity sensor's humidity sensor was explored in detail. Also, the reasons for the highest sensitivity of the asymmetric n-m electrode QCM humidity sensors with a smaller electrode diameter were investigated in terms of both mass sensitivity and fringing field effect. This research not only shows that the chitin nanofiber is an excellent candidate material for moisture detection, but also provides a new perspective on the design of high-performance QCM humidity sensors.

Source link: https://europepmc.org/article/MED/36080072

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions