Active Noise Control in Air-Conditioning Ducts

A proposed model is set up for a Noise-cancelling of air conditioning by means of active noise control. Essentially, this involves using a microphone, placed near the fan, and an electronic circuitry which generates an "anti-noise" sound wave with the opposite polarity of the sound wave of the microphone. This results in destructive interference, which cancels out the noise within the enclosed volume of the fan. The be