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Modelling parallel assemblies of porous materials using the equivalent circuit method
1Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Duebendorf, Switzerland reto.pieren@empa.ch, kurt.heutschi@empa.ch.
The Journal of the Acoustical Society of America
|February 21, 2015
Summary
The equivalent circuit method offers similar versatility to the parallel transfer matrix method (P-TMM) for predicting material absorption properties, accommodating diverse backing configurations.
Area of Science:
- Acoustics
- Materials Science
- Computational Physics
Background:
- The parallel transfer matrix method (P-TMM) and admittance sum method (ASM) are used to predict acoustic absorption in parallel material assemblies.
- P-TMM has shown greater versatility than ASM in handling various backing configurations.
Purpose of the Study:
- To demonstrate that the equivalent circuit method offers comparable universality to P-TMM.
- To highlight the flexibility of the equivalent circuit method for acoustic absorption predictions.
Main Methods:
- Investigation of the accuracy of P-TMM and ASM.
- Application and analysis of the equivalent circuit method for parallel material assemblies.
Main Results:
- P-TMM was found to be more versatile than ASM for different backing configurations.
- The equivalent circuit method demonstrates similar universality to P-TMM.
Conclusions:
- The equivalent circuit method is a versatile tool for predicting acoustic absorption properties.
- This method expands the options for analyzing complex material assemblies with varied backings.
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