Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/22658
Title: Characterization of impedance boundary as damped harmonic oscillators via impulse reflection
Authors: Fung, KY
Jing, X
Issue Date: 2006
Publisher: Acoustical Society of America
Source: Journal of the Acoustical Society of America, 2006, v. 119, no. 6, p. 3831-3838 How to cite?
Journal: Journal of the Acoustical Society of America 
Abstract: This paper demonstrates that various sound-absorbing/reflective materials or structures can be effectively characterized over a wide band of frequency by the sum of only a few damped harmonic oscillators. This method is physically sound in the sense that each damped harmonic oscillator corresponds to the natural resonance of the impedance boundary as it is numerically advantageous to afford a simple, recursive, efficient, and unconditionally stable boundary algorithm for computational aero-acoustics applications. The time-domain damped-harmonic-oscillator impedance characterization method is finally validated by accurate predictions of reflected pulses from impedance boundaries physically formed of Helmholtz resonators or various exits of a circular pipe.
URI: http://hdl.handle.net/10397/22658
ISSN: 0001-4966
EISSN: 1520-8524
DOI: 10.1121/1.2198185
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