| 초록 |
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 with a flat frequency response, a high sensitivity, and a flexible/conformable form factor has proved a major challenge. Here, we present an ultrathin and skin-conformable vibration sensor that detects skin acceleration. 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 exhibits superior skin conformity, which enables exact voice recognition because it eliminates vibrational distortion on curved skin surfaces. Our device is suitable for several promising voice-recognition applications such as security authentication, remote control systems and vocal healthcare. |
