低频隔音
low-frequency sound insulation
电话隔音室
sound-proof telephone cabinet
隔音板
acoustic board
celotex board
dumboard
sound insulating panel
acoustic lining
noise barriers
noise barrier
sound boarding
acoustical screen
acoustic panel
baffle
acoustic baffle
celotex
sound insulating board
sound-proof board
bark covering for sound insulation
隔音材料
Deafening
sound-proof material
sound-absorptive material
deadener
sound insulation materials
acousticmaterial
soundproof material
sound insulating material
deadening
隔音防火门
sound insulated fire door