An Ultrathin Conformable Vibration-responsive Electronic Skin for Quantitative Vocal Recognition

Overview

Journal Nat Commun

Specialty Biology

Date 2019 Jun 20

PMID 31213598

Citations 28

Authors

Siyoung Lee

Junsoo Kim

Inyeol Yun

Geun Yeol Bae

Daegun Kim

Sangsik Park

Il-Min Yi

Wonkyu Moon

Yoonyoung Chung

Kilwon Cho

Affiliations

Soon will be listed here.

Abstract

Flexible and skin-attachable vibration sensors have been studied for use as wearable voice-recognition electronics. However, the development of vibration sensors to recognize the human voice accurately with a flat frequency response, a high sensitivity, and a flexible/conformable form factor has proved a major challenge. Here, we present an ultrathin, conformable, and vibration-responsive electronic skin that detects skin acceleration, which is highly and linearly correlated with voice pressure. This device consists of a crosslinked ultrathin polymer film and a hole-patterned diaphragm structure, and senses voices quantitatively with an outstanding sensitivity of 5.5 V Pa over the voice frequency range. Moreover, this ultrathin device (<5 μm) exhibits superior skin conformity, which enables exact voice recognition because it eliminates vibrational distortion on rough and curved skin surfaces. Our device is suitable for several promising voice-recognition applications, such as security authentication, remote control systems and vocal healthcare.

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