Noise control in a rectangular duct using active structural panel

K. Kannan; S. P. Singh; K. K. Pujara

doi:10.1117/12.514632

14 October 2003 Noise control in a rectangular duct using active structural panel

K. Kannan, S. P. Singh, K. K. Pujara

Proceedings Volume 5062, Smart Materials, Structures, and Systems; (2003) https://doi.org/10.1117/12.514632
Event: Smart Materials, Structures, and Systems, 2002, Bangalore, India

Abstract

In the present work a novel approach for Active Noise Control (ANC) is attempted. A structural panel used as a secondary source for active noise control in a rectangular duct is developed and tested. The structural panel is a square Aluminum trim panel, which is fixed on a steel frame vertically and excited by an electrodynamic exciter. The structural panel has many merits as an acoustic source over traditional loud speakers: it is simple in geometry, lower mass, easy in construction and requires only a simple modification of materials already installed on the duct. The vibration response and acoustic radiation response of the structural panel are studied for a simply supported boundary condition, when panel is subjected to less than 350 Hz harmonic excitation. Real time active noise control experiments are performed in a laboratory using the active structural panel as secondary source. Local attenuation of sound pressure levels of upto 45 dB is realized, in a particular location of the duct when its enclosure was excited by 210 Hz pure tone of harmonic sound.

Citation Download Citation

K. Kannan, S. P. Singh, and K. K. Pujara "Noise control in a rectangular duct using active structural panel", Proc. SPIE 5062, Smart Materials, Structures, and Systems, (14 October 2003); https://doi.org/10.1117/12.514632

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