Acoustic Doors Acoustic doors are fully tested to ISO standards and achieve an average level of sound reductions up to 55dB. They are suitable for a wide variety of applications including sound and broadcasting studios, theatres, schools, hospitals, factories and heavy engineering plants. A patented rail system allows safe and easy operation combined with perfect sealing when closed. Our acoustic rated roors are supplied as an entire unit – door frame, door blade, hinges, automatic threshold seal (if applicable). Strong, durable construction. All doors are factory assembled and tested for correct alignment and fit. Operation can be manual or automatic.