Large‐Sized Micropillars Enable Superior Performance MXene/PDMS Piezoresistive Sensors Toward Accurate Musical Tone Recognition

Here we present a flexible MXene/polydimethylsiloxane (PDMS) piezoresistive sensor featuring large‐sized micropillars (hundreds of micrometers), which promote continuous stress transfer and dynamic interfacial contact evolution, thereby alleviating the intrinsic trade‐off between sensitivity and detection range. The PDMS micropillar arrays are fabricated using laser‐ablated through‐hole molds. The micropillar tips preferentially deform under subtle stimuli, whereas the base layer is progressively engaged under increasing loads. This hierarchical deformation mechanism enables continuous resistance modulation over a broad pressure range. Consequently, the sensor delivers a sensitivity of 103 kPa − 1 over a wide detection range of 0.6–588 kPa, together with fast response/recovery times (6/20 ms) and robust cyclability (10,000 cycles). Beyond physiological monitoring, the sensor further enables acoustic‐vibration detection from the Erhu, a traditional Chinese bowed instrument. Assisted by a one‐dimensional convolutional neural network (1D‐CNN), a pitch recognition accuracy of 97.5% is achieved. This work provides a structural design strategy for high‐performance piezoresistive sensors and establishes a new paradigm for intelligent recognition and acoustic‐based human–machine interfaces.