Medium and small tanks and surface curvature radius of curve or surface smaller irregular equipment, building the air duct insulation and dew and wall body sound-absorbing heat preservation.
小型储罐及表面曲率半径较小的弧面或表面不规则的设备、建筑空调管道保温防露和墙体的吸音保温。
2
Sea surface and bottom constituted sound propagation environment of the neritic acoustic duct field.
海面与海底构成了声源浅海海域波导场的声传播环境。
3
Points out the key issues in noise control including the arrangement of sound absorber, noise transmission from machine room and duct and noise superposition.