Hand Gesture Classification Based on Nonaudible Sound Using Convolutional Neural Network

<div>Comparison of STFT results on recorded data. (a) STFT result of sound wave recorded when no action is taken. (b) STFT result of sound wave recorded when the microphone is blocked.</div>

Journal of Sensors

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Figure 3: Hand Gesture Classification Based on Nonaudible Sound Using Convolutional Neural Network 