The sound attenuation of different types of glass can be measured on a sound test installation in a test laboratory. A glass unit, always of the same standardised size, is fitted with putty in an opening in a wall. At the front, a sound source projects sound of a given frequency against the glass (like traffic noise assaulting the window of a house), and behind the glass is a microphone that measures the admitted sound volume in relation to frequency.The highest sound attenuation values are achieved by laminated safety glass with special PVB acoustic film, best of all in double glazing. For several years, triple glazing has been available, and even better sound attenuation is achieved if the two outer panes consist of laminated safety glass. These constructions also have the best thermal insulation in addition.All noise disturbs our concentration and is capable of disrupting our sleep and causing tension and stress. Two similar sounds, even at the same volume, can be perceived differently. For example, the rushing of a waterfall can be just as loud as the noise of a passing car, yet for many people the former is soothing, while the latter is usually a nuisance.The sound attenuation of different types of glass can be measured on a sound test installation in a test laboratory. A glass unit, always of the same standardised size, is fitted with putty in an opening in a wall. At the front, a sound source projects sound of a given frequency against the glass (like traffic noise assaulting the window of a house), and behind the glass is a microphone that measures the admitted sound volume in relation to frequency. A computer program then calculates a „mean sound attenuation value“ from this. And from this value, it is possible to decide which glass can be used for which sound insulation window.
https://wfmmedia.com/sound-attenuation-with-laminated-safety-glass/
