Acoustic Sensing: Glass Microfibers Bring Touch, Pressure, and Motion to Textiles
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SonoTextiles integrate glass microfibers that conduct sound waves, allowing for efficient data processing through the use of varying frequencies. Researchers have woven these glass fibers into the fabric at regular intervals. Each fiber has a small transmitter at one end that emits sound waves, while the other end is connected to a receiver that detects any changes in these waves.
Each transmitter operates at a unique frequency, significantly reducing the computing power needed to pinpoint which fiber experienced a change in sound waves. When a glass fiber moves, the acoustic waves traveling through it change in length and lose energy. On a T-shirt, this could be triggered by body movement or even breathing. ETH's Yingqiang Wang highlights, "We used frequencies in the ultrasonic range, around 100 kilohertz—well beyond the range of human hearing, which is between 20 hertz and 20 kilohertz. The wavelength within the glass fibers changes instantly upon being touched or bent.
12:53 PM, May 26
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