Inexpensive Implementation of Active Noise Control Systems for Acoustic Duct with Application to a Ventilation System

Abstract

In this paper we examine inexpensive implementation of active noise control (ANC) systems for one-dimensional duct based on experiments carried out on the ventilation system installed in a real house. Two types of time-invariant low-order controllers are compared : One is based on the conventional adaptive filter (the filtered-U recursive LMS algorithm) in which the coefficients are fixed by the stationary values. Another is obtained by a robust control method (sampled-data _??_∞ control). The experimental results show the advantage of the robust control method.