Laminated glass has a certain sound insulation effect, but its specific performance depends on its structure and materials.
The sound insulation principle of laminated glass
Laminated glass is composed of two or more layers of glass with a layer of PVB (polyvinyl acetal) or EVA (ethylene-vinyl acetate) film in between. Its sound insulation capacity mainly comes from:
The damping effect of the intermediate adhesive layer: It can absorb part of the sound wave vibration and reduce sound penetration.
Glass thickness and combination: Thicker glass or asymmetrical thickness designs (such as 5mm+3mm) can block sound waves of different frequency bands.
Multi-layer structure: Some high-end laminated glass uses multiple layers of adhesive films or glass to further enhance the sound insulation effect.
2. Sound insulation performance comparison
|
type of glass |
Sound insulation effect (STC value) |
characteristic |
|
Ordinary single-layer glass (6mm ) |
About 25 to 30 |
Low-frequency noises (such as traffic sounds) have obvious penetration |
|
Ordinary laminated glass (6mm ) |
About 30 to 35 |
It is effective against medium and high-frequency noises (human voices, speakers) |
|
Professional soundproof laminated glass |
It can reach 35 to 40+ |
Combining PVB film and thickness optimization, the low frequency has also been improved |
|
*STC (Sound Transmission Class) : The higher the value, the better the sound insulation |
||
3. The sound insulation limitations of laminated glass
Low-frequency noise can still penetrate: such as the roar of heavy trucks and the vibration of subwoofers. Other measures (such as thickening the glass and using laminated insulating glass) need to be combined.
The sealing performance has a significant impact: If there are gaps in the window frame or wall, the sound insulation effect will be significantly reduced.
4. Methods to enhance sound insulation effect
If stronger sound insulation is needed, you may consider:
Laminated insulating glass: Laminated glass + insulating layer (such as 6mm laminated +12mm air layer +6mm glass), which combines sound insulation and heat preservation.
Asymmetric thickness design: such as a 3mm+5mm glass combination, reduces resonance.
Professional sound insulation film: Apply high-damping sound insulation film to the existing glass.
5. Suggestions for applicable scenarios
For common needs (such as street-facing Windows in residential buildings) : Laminated glass can reduce medium and high-frequency noises such as traffic and human voices.
High-demand scenarios (near recording studios and airports) : Professional soundproof laminated glass or composite structures (such as laminated insulating glass) should be selected.
Summary: Laminated glass has better sound insulation than ordinary single-pane glass, especially effective against medium and high-frequency noise, but its effect on low-frequency noise is limited. If extremely high sound insulation is required, it is necessary to combine other designs or choose multi-layer composite glass.
