Acoustic windowis a noise reduction window that is made from at least two pieces of noisereduction glass that have been bonded with polyvinyl butyral (PVB). Availablein double, triple and quadruple glazed versions, acoustic windows have beenused to contain or exclude sound in a very wide range of situations; fromfactory offices and enclosures to TV studios, audio metric rooms, test cells,translation booths, music practice rooms, hotels and office buildings.