An Electret‐Powered Skin‐Attachable Auditory Sensor that Functions in Harsh Acoustic Environments
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SCOPUS
- Title
- An Electret‐Powered Skin‐Attachable Auditory Sensor that Functions in Harsh Acoustic Environments
- Authors
- 이시영; 노하정; Kim, Junsoo; 정세인; Seo, Donghwan; Moon, Wonkyu; Cho, Kilwon
- Date Issued
- 2022-10
- Publisher
- WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
- Abstract
- Auditory sensors have shortcomings with respect to not only personalization with wearability and portability but also detecting a human voice clearly in a noisy environment or when a mask covers the mouth. In this work, an electret-powered and hole-patterned polymer diaphragm is exploited into a skin-attachable auditory sensor. The optimized charged electret diaphragm induces a voltage bias of >400 V against the counter electrode, which reduces the necessity of a bulky power source and enables the capacitive sensor to show high sensitivity (2.2 V Pa-1) with incorporation of an elastomer nanodroplet seismic mass. The sophisticated capacitive structure with low mechanical damping enables a flat frequency response (80-3000 Hz) and good linearity (50-80 dB(SPL)). The hole-patterned electret diaphragms help the skin-attachable sensor detect only neck-skin vibration rather than dynamic air pressure, enabling a person's voice to be detected in a harsh acoustic environment. The sensor operates reliably even in the presence of surrounding noise and when the user is wearing a gas mask. Therefore, the sensor shows strong potential of a communication tool for disaster response and quarantine activities, and of diagnosis tool for vocal healthcare applications such as cough monitoring and voice dosimetry.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/115842
- DOI
- 10.1002/adma.202205537
- ISSN
- 0935-9648
- Article Type
- Article
- Citation
- Advanced Materials, vol. 34, no. 40, page. 2205537, 2022-10
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- There are no files associated with this item.
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