Calculation of absorption coefficient of micro-perforated absorbers
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چکیده
Micro-perforated absorber is a newly developed sound absorber, and it has a number of attractive features: • Unlike conventional perforated absorbers, micro-perforated absorber can be made from transparent materials like plastic glass. • Unlike commonly used fibrous absorptive materials, micro-perforated absorber is fibrous-free and thus, there is no health concern. • Micro-perforated membranes are lightweight and inexpensive. The absorption performance of micro-perforated absorber is very good. Typically the absorption coefficient exceeds 0.4 over 3-5 octaves.
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