Abstract
Triboelectricity in materials has emerged as an innovative and increasingly researched approach for acoustic sensing. Despite its promise, the field has faced significant challenges due to limited working bandwidth and sensitivity. As a result, we have developed a dual-symmetry triboelectric acoustic sensor (DS-TAS), featuring an expansive working bandwidth from 20 Hz to 200 kHz, exceptional sensitivity of 6.67 V/Pa, and a detection limit as low as 0.002 Pa. Moreover, the DS-TAS has been successfully integrated into a real-time, multi-directional ultrasonic radar system, achieving an impressively minimal detection error of less than 5 mm. This breakthrough in acoustic sensing performance positions the DS-TAS as a significant milestone for the field, with broad applications ranging from human-machine interaction to voice recognition.
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