Vibrating Window Negates Noise

A noise-negating method that thwarts vibration with vibration could be available for use in apartments, hotels and offices in five years. Wires running through the window link the stamp-sized patches to a computer controller and an amplifier. When a sound-generated vibration rattles the window, the piezoelectric patch senses it. That data goes to the controller, which in turn delivers a specific electric charge back up to the patch, causing it to vibrate at a phase that ideally cancels out the sound vibrations

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