ACTIVE NOISE CONTROL: ITS IMPLEMENTATION & PERFORMANCE

Shivamurti, M ACTIVE NOISE CONTROL: ITS IMPLEMENTATION & PERFORMANCE. In: MATLAB workshop, Bangalore.

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Abstract

Active noise control systems based on feedforward approach using filtered-x LMS algorithm for single channel (in a duct) and multi-channel (in an enclosure), are considered. The systems are implemented on a TMS320C30 processor based d_space DSP board and their performances are evaluated. In the case of duct, for the tonal and white noise, a noise reduction of about 32dB and 12dB, respectively are achieved. For a duct with an axial flow fan, using anti-turbulence probes, 7.66dB noise reduction is obtained. For the multi-channel case, a 2 channel system for a typical aircraft cockpit mockup model is considered and a reduction of about 20dB is obtained for a tonal noise.

Item Type: Conference or Workshop Item (Paper)
Subjects: ENGINEERING > Electronics and Electrical Engineering
Depositing User: Mr M shivamurti
Date Deposited: 08 Jun 2011 08:18
Last Modified: 08 Jun 2011 08:18
URI: http://nal-ir.nal.res.in/id/eprint/9203

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