Site-cell aluminom ụfụfụ na-ezo aka aluminum ụfụfụ nke esịtidem pores na-ejikọta ọnụ, na a pore size nke 0.5-1.0 mm, a porosity nke 70-90%, na a site-porosity nke 55-65%.Site-oghere aluminum ụfụfụ nwere. magburu onwe ụda absorption arụmọrụ na ọkụ na-eguzogide n'ihi na ya metal e ji mara na porous Ọdịdị. Mbelata mkpọtụ mkpọtụ NRC> 0.75, ọkwa ọkụ bụ A1, na ụfụfụ aluminom site na oghere nwere ike ịhazi ya na ihe mgbochi dị iche iche na-aga n'ihu yana oghere dị iche iche site na oghere (site na oghere). N'ọnọdụ nkịtị, usoro mmịpụta ụda nke aluminom ụfụfụ na-adabere na mmịnye ụda viscous na nnabata ụda ọkụ. Mmetụta mmịpụta ụda na nke a abụghị ihe doro anya. Ọfụfụ aluminom site na cell anyị na-emepụta na-eme ka ọkpụkpụ ụfụfụ nke aluminom dịkwuo n'usoro na ụda na-adọrọ adọrọ. Obere ọwa na sel ndị a kpụrụ n'ime na-etolite ọnụ ọgụgụ dị ukwuu nke ngalaba obe na mberede yana ọnụ ọgụgụ dị ukwuu nke oghere Helmholtz n'akụkụ akụkụ iji nweta nnabata ụda. Karịsịa, mmetụta mmịpụta ụda maka ọkara na obere frequencies doro anya karịa nke ihe ọdịnala.