Active Control of Noise Radiating from Duct Opening

This paper considers the minimization of the total acoustic power radiated from a duct opening. The power attenuation of sound absorption materials or barriers is relatively poor at low frequencies. Therefore, the authors propose active noise control algorithm in order to minimize the total acoustic power radiated from the duct opening by designing the duct opening, leading to the noise reduction in the entire area around the duct opening. In this study, the power reducing performance with this algorithm was verified by conducting the computer simulation.