104 A Study on Active Noise Control for Minimizing Total Acoustic Power : Minimization of Acoustic power under Zero Control Power Output

Abstract

This paper concerns the minimization of total acoustic power radiated from noise source. First, the authors focus that the acoustic power of the control source under the optimal condition for minimizing total acoustic power become zero. Then, the authors propose a method employing an active noise control in order to minimize the total acoustic power by investigating the acoustic intensity distribution pattern of the control source and characteristics of control speaker. This power reducing performance is verified on the basis of theoretical estimations and experiments.