Selection of Active Noise Control Strategy: Two Test Cases

Active noise control is a technique in which unwanted sound, noise, is cancelled by introducing controllable secondary sources. Active noise control is applied to various applications from active hearing protectors to active attenuation of aircraft cabin noise. In the selection of appropriate ANC strategy to an application, several aspects have to be considered. In this paper, selection of active noise control strategy and the implementation of the ANC systems in two test cases are presented and discussed. The first test case is active attenuation of a moving machinery cabin, while the other one is active improvement of sound insulation of a double-wall structure. Simulation and measurement results from these cases are evaluated and the selections of the strategy in each case are validated.