Acoustic Pannel: 1)Soundproof,2)Fire-resistant,3)Dampproof,4)Heat insulation.5)Easy to install,6)Decorative art fluent appear Polyester Fibre ... Acoustic Panel are excellent performance at absorbing noises 125 to 4000HZ ... , Station, meeting room, Office, Airport, villas and residential areas etc Polyester Fiber Acoustic Panel