High-sensitive and ultra-wide spectrum multifunctional triboelectric acoustic sensor for broad scenario applications

Abstract

Based on the unique capacitance model of triboelectric technology, here, a novel self-powered triboelectric acoustic sensor (T-MIC) was fabricated, which is capable of simultaneously sensing acoustic waves not only covering the full frequency range of human hearing from 20 to 20,000 Hz, but also possessing higher frequency resolution (accuracy 1 Hz) and higher sensitivity (21.50 times) than the best reported triboelectric acoustic sensor. The T-MIC is faultless competent for commercial applications in high-quality music recording, wireless video communication, voice content inputting and human-robot interaction. Furthermore, based on the principle of acoustics, a theoretical model of T-MIC is proposed. Considering a broad selection of materials and the simpler preparation process of T-MIC, it has great advantages than that of many commercial acoustic wave sensors in performance and cost. So, the T-MIC can provide a feasible low-cost option for perception and detection of the acoustic waves in the commercial applications.