The Error Involved in the Equivalent Electroacoustic Circuit Approach for the Estimation of the Absorption Coefficient of Multiple Layer Perforated Plate Systems

다중 다공판 시스템의 흡음계수 계산에 있어서 전기음향등가회로법의 오류

The equivalent electroacoustic circuit approach has been conventionally used for estimating the absorption coefficient of a single layer perforated plate system. When the single layer system is extended to the multiple layer ones, however, it is found that an analogy error has been involved in the equivalent electroacoustic parallel circuit approach proposed by previous investigators. The analogy error is demonstrated by the corrected equivalent electroacoustic circuit approach in this study.