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
    Division/Department: Aerospace Electronics and Controls Division
    Depositing User: Mr M shivamurti
    Date Deposited: 08 Jun 2011 13:48
    Last Modified: 08 Jun 2011 13:48
    URI: http://nal-ir.nal.res.in/id/eprint/9203

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