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http://dx.doi.org/10.6109/jkiice.2012.16.8.1599

Numerical Analysis for Modeling of Sound Absorbing Medium using Transmission Line Matrix Modeling  

Park, Kyu-Chil (부경대학교 정보통신공학과)
Yoon, Jong-Rak (부경대학교 정보통신공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.16, no.8, 2012 , pp. 1599-1605 More about this Journal
Abstract
We introduced an approach of modeling of a sound absorbing medium that had different absorbing coefficient according to frequency. To obtain the time domain result of the frequency characteristics of a sound absorbing medium, transmission line matrix modeling was used. To input sound absorbing effect in TLM modeling, we added a FIR filter at a node instead of absorbing component using resistance component. There were simulated the characteristics of time-shift, low pass filter, high pass filter using the FIR filter with 7-tap coefficients, then compared with theoretical results. From various simulation results, we could find that added FIR filter coefficient in TLM modeling was an useful way to model a sound absorbing medium.
Keywords
Sound absorbing medium; transmission line matrix modeling; sound wave propagation; finite impulse response filter;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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