1.How to block the sound bridge transmission?
Fill porous sound-absorbing materials: fill porous materials such as glass wool, rock wool, centrifugal wool, etc. between two layers of color-coated rolls.
Principle: The fiber structure inside the porous material can absorb sound wave energy, and at the same time use the loose characteristics of the material to buffer vibration and reduce the rigid connection between the color-coated roll and the base layer.
Note: Make sure that the sound-absorbing material is evenly filled to avoid direct contact with the color-coated roll.
Set up an air layer: reserve a 10~20mm air layer between the color-coated roll and the wall/keel.
Principle: The air layer can consume energy by reflection and refraction of sound waves at the interface of different media and reduce vibration transmission. If combined with sound-absorbing materials, the effect will be better.
2.How to optimize installation and connection methods to reduce solid-borne sound?
The rigid connection during the installation process will form a "sound bridge", which needs to be blocked through detailed design:
Avoid direct rigid fixation: When the color-coated roll is connected to the keel and frame, use elastic shock-absorbing pads to isolate and reduce the transmission of vibration through the fixed point.
Offset splicing to reduce gaps: Reserve a 1~2mm gap at the splicing of the color-coated roll and fill it with sound insulation sealant to prevent airborne sound from leaking through the gap.
3.How to design targeted composite structures based on usage scenarios?
Building exterior wall/roof:
Color-coated roll + 20mm air layer + 50mm rock wool board + 1mm damping steel plate + color-coated roll
Equipment housing (such as generator, air conditioner outdoor unit):
Color-coated roll (outer layer) + 3mm butyl rubber damping layer + 30mm centrifugal glass wool (sound absorption) + perforated color-coated roll
Indoor partition: Color-coated roll + light steel keel (spacing 600mm) + 75mm glass wool (filling keel cavity) + paper-faced gypsum board (inner layer, increasing sound insulation)
(Use the keel cavity to fill the sound-absorbing material, and the gypsum board to increase the structural thickness and reduce solid sound transmission)
4.What are the key considerations?
Avoid relying solely on thickness: Simply increasing the thickness of the color-coated coil has a very limited effect on sound insulation, and the "multi-layer composite structure" needs to be optimized.
Prioritize blocking the sound bridge: All connection points must be isolated with shock-absorbing pads, otherwise the vibration will bypass the sound insulation layer through the connection points.
Combination of sound absorption and sound insulation: Airborne sound transmission needs to be processed by a combination of "sound-absorbing materials (such as rock wool) absorbing energy" + "sound insulation materials (such as damping panels) blocking transmission", neither of which can be missing.
5.Through the above methods, is the sound insulation effect of color-coated coils improved?
Through the above methods, the sound insulation effect of color-coated coils can be improved from "almost no sound insulation" to meet the needs of general scenarios (such as reducing outdoor noise to an acceptable level indoors), but the specific effect needs to be adjusted according to the material selection, thickness and installation process of the composite structure. If necessary, the design can be optimized through acoustic testing.