Acoustic interlayers refer to the use of a special polyvinyl butyral (PVB) – a resin-based plastic – as the plastic in laminated glass, which provides sound-reducing qualities in the glass. Acoustic interlayers can be found in vehicles, where laminated windshields are standard features and laminated side windows, also called sidelites, have become more common since 2007. Vehicles that have acoustic interlayers in the windshield or sidelites are said to block out more exterior noise than vehicles that don’t, which should offer occupants a quieter ride.


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