Perforated acoustic vaj huam sib luag yog ib hom nyob rau hauv pem hauv ntej ntawm lub rooj tsavxwm, rov qab puag ncig lub qhov qauv ntawm lub suab nqus cov ntaub ntawv, tsis tsuas yog muaj cov tsoos kho kom zoo nkauj, tshav kub rwb thaiv tsev, tiv thaiv hluav taws, plua plav pov thawj, lub teeb, tsis hloov kho, tsis lwj, ntau suab absorption nyhuv, siab zog, mus ...
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