一种实现听觉电子皮肤的高保真皮肤贴附声学传感器,Advanced Materials

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一种实现听觉电子皮肤的高保真皮肤贴附声学传感器
Advanced Materials ( IF 27.4 ) Pub Date : 2022-02-22 , DOI: 10.1002/adma.202109545
Siyoung Lee ₁ , Junsoo Kim ₂ , Hajung Roh ₁ , Woongji Kim ₂ , Sein Chung ₁ , Wonkyu Moon ₂ , Kilwon Cho ₁

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可穿戴听觉传感器对于智能人机交互和物联网的用户友好型声音识别系统至关重要。然而，先前报道的可穿戴传感器由于频率响应差和声压范围窄而导致声音传感质量有限。在这里，提出了一种可附着皮肤的声学传感器，它在比人耳更宽的听场中具有更高的传感精度，具有平坦的频率响应（15-10 000 Hz）和良好的线性范围（29-134 dB _SPL) 以及对柔性表面和人体皮肤的高度适形性。这种高声音传感质量是通过在使用声-机-电建模设计的隔膜结构中利用聚合物材料的低残余应力和高可加工性来实现的。因此，这种声学传感器通过感知人类可听到的声音，甚至是人耳无法在不失真的情况下检测到的响亮声音和低频声音，从而显示出高声学保真度。基于聚合物的超小型（<9 mm ²) 和薄型传感器在柔性基板和宽温度范围（25 至 90 °C）内保持声音检测质量。声学传感器显示出听觉电子皮肤的巨大潜力，当附着在人体皮肤上的传感器连接到运行最新人工智能助手的商用移动设备时，它可以成功识别声音。

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A High-Fidelity Skin-Attachable Acoustic Sensor for Realizing Auditory Electronic Skin

Wearable auditory sensors are critical in user-friendly sound-recognition systems for smart human–machine interaction and the Internet of Things. However, previously reported wearable sensors have limited sound-sensing quality as a consequence of a poor frequency response and a narrow acoustic-pressure range. Here, a skin-attachable acoustic sensor is presented that has higher sensing accuracy in wider auditory field than human ears, with flat frequency response (15–10 000 Hz) and a good range of linearity (29–134 dB_SPL) as well as high conformality to flexible surfaces and human skin. This high sound-sensing quality is achieved by exploiting the low residual stress and high processability of polymer materials in a diaphragm structure designed using acousto-mechano-electric modeling. Thus, this acoustic sensor shows high acoustic fidelity by sensing human-audible sounds, even loud sounds and low-frequency sounds that human ears cannot detect without distorting them. The polymer-based ultrasmall (<9 mm²) and thin sensor maintains sound-detection quality on flexible substrates and in a wide temperature range (25 to 90 °C). The acoustic sensor shows a significant potential of auditory electronic skin, by recognizing voice successfully when the sensor attached on human skin is connected to a commercial mobile device running the latest artificial intelligence assistant.

更新日期：2022-02-22

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