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This is one wearable and multifunctional sound pickup device. The idea is originally inspired from the natural reaction when people hear some sounds; they will put their hands around the ears for gathering sounds.
To use the design, you need to do a gesture with your hand nearby the ears and face to the sound direction. Then, adjust the knob on the side for the sound you want and changing volume. MCU(Microprogrammed Control Unit) in the device is being used for frequency adjustment (selecting the sound in certain area).