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Question:

whether the sound insulation membrane of windows and door is useful?

nan

Answer:

Doors and windows soundproof membrane effect is still very good, under normal circumstances, a qualified good installment doors and windows soundproofed reasonable film thickness is sufficient to achieve a compliant body sound insulation, windows and doors sound insulation membrane is to prevent noise intrusion, you can add a layer of tight sound insulation film or a relatively strong absorption of cotton close to the transport routes. In order to prevent TV, stereo, piano disturbing your neighbors, you can add ultra-thin glass absorption cotton in television, audio background wall, the effect is very good.
the sound insulation can only be effective to the low-frequency noise, if the roadside has truck, bus or car horn whistle, I recommend installing the soundproof windows; if it is the kind of low frequency sound which is less than 50 db, then sticking the sound insulation film has a good effect.
Useful, the insulation film is a multilayer structure, the polyethylene butyral (PVB) sandwiched the resin insulation layer. the intermediate film evenly distributed the fine particles with heat insulating effect (fine particles of insulation). when using the sound insulation membrane in the construction, the high performance middle membrane in middle of the film has the function of light transmittance performance, which does not block visible light transmittance of the building, and maintain a clear sight. concrete steps of posting sound insulation film on window 1, cut film (according to glass size cut the glass film, and it should be slightly 1 cm larger than the glass ); 2, wash the glass thoroughly and spray some water, using film scratch to scrape more times, making the glass no soft flocks, dust-free and sand-free; 3, spray water on the glass spray a layer of water on the glass after washing it; 4, sprayed water on the film separate the protective film and stick membrane, spray water on the plastic side of the film layer; 5, scrape the water between the film and the glass, use film scraper scrape the inside water slowly, cut the corner of the stick membrane.

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