Does the installation of window film help to reduce the transmission of sound (noise) through glass? Are there any films that have "sound deadening" properties?
Answer: The long and short answer is: No. For good or ill, surface-mounted window films in general appear to have little measurable effect on the transmission of sound through glass. Given the physics of glass and surface-mounted thin films, window films simply do not have the mass needed to absorb significant amounts of sound energy striking a window.
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