Author(s)

G. Rosenhouse & 0. Findling - Eldar

Abstract

Active noise control effect on penetration of urban noise from 3-D spaces into enclosures G. Rosenhouse ") & 0. Findling - ~ldar(" ("I Faculty of Civil Engineering - Technion, Haifa, 32000, Israel Abstract A new acoustic model of attenuation of environmental noise by an electroacoustic active noise control (ANC) unit is suggested here. It analyses noise escape from an enclosure to the environment through openings and vice versa, in the cases where the ANC is on and off. The simulation is based on solving the sound field by BEM. The BEM has to satisfy specific boundary conditions over a rigid boundary and the opening (window). The particle velocity defines the primary (original) source and the secondary sources (of the ANC). The sensitivity of the system were examined, and the positions of the error sensors of the ANC at the opening zone were optimised in order to improve the performance of the system. Also, the locations and complex amplitudes of the secondary sources were obtained by satisfyin

Keywords