A simple formula for insertion loss prediction of large acoustical enclosures using statistical energy analysis method
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Insertion loss prediction of large acoustical enclosures using Statistical Energy Analysis (SEA) method ispresented. The SEA model consists of three elements: sound field inside the enclosure, vibration energy of the enclosurepanel, and sound field outside the enclosure. It is assumed that the space surrounding the enclosure is sufficiently largeso that there is no energy flow from the outside to the wall panel or to air cavity inside the enclosure. The comparison ofthe predicted insertion loss to the measured data for typical large acoustical enclosures shows good agreements. It isfound that if the critical frequency of the wall panel falls above the frequency region of interest, insertion loss isdominated by the sound transmission loss of the wall panel and averaged sound absorption coefficient inside theenclosure. However, if the critical frequency of the wall panel falls into the frequency region of interest, acoustic powerfrom the sound radiation by the wall panel must be added to the acoustic power from transmission through the panel.
Abstract
Insertion loss prediction of large acoustical enclosures using Statistical Energy Analysis (SEA) method ispresented. The SEA model consists of three elements: sound field inside the enclosure, vibration energy of the enclosurepanel, and sound field outside the enclosure. It is assumed that the space surrounding the enclosure is sufficiently largeso that there is no energy flow from the outside to the wall panel or to air cavity inside the enclosure. The comparison ofthe predicted insertion loss to the measured data for typical large acoustical enclosures shows good agreements. It isfound that if the critical frequency of the wall panel falls above the frequency region of interest, insertion loss isdominated by the sound transmission loss of the wall panel and averaged sound absorption coefficient inside theenclosure. However, if the critical frequency of the wall panel falls into the frequency region of interest, acoustic powerfrom the sound radiation by the wall panel must be added to the acoustic power from transmission through the panel.
참고문헌 (17)
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