Smart home sound insulation wall polyurethane catalyst PT303 broadband noise attenuation gradient structure

Smart home sound insulation wall: polyurethane catalyst PT303 and broadband noise attenuation gradient structure In modern life, noise pollution has become one of the important issues affecting people’s quality of life. Whether it is the noise of traffic in the city, the noise of neighbors, or the operation of electrical equipment in the home, it can make people feel tired and irritable. Therefore, smart home sound…