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Efficient Filter-Based Model for Resonator Panel Absorbers

A novel and computationally efficient method for evaluating the response of a perforated absorption panel with an arbitrary number of Helmholtz resonator elements is proposed. The method is based on a simplified, parametric filter-based model using 2nd-order parametric IIR digital filters that emulate both the linear filtering response of each resonator and the relative acoustic path delays and gains of responses. This allows for the evaluation of the time- and frequency-domain response of arbitrary-sized perforated panels in any specific receiver position under free-field and diffuse-field acoustic environments. Unlike existing analytical approaches, the proposed approach offers significant computational efficiency and allows flexible and fast practical evaluation of the effects of such panel absorbers.

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JAES Volume 62 Issue 1/2 pp. 14-24; January 2014
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