Acoustic decoration is the use of acoustic principles and the use of decorative materials to meet the requirements of the decoration, and to achieve the relevant professional indicators required. General common decoration is often limited to a simple soft package processing, although it can prevent the sound rebound. In fact, this is far from the real acoustic decoration. Even more expensive electro-acoustic equipment, the sound effect will not be good! Acoustic Decoration Requirements: A. Background noise Less than or equal to NR35. B. Acoustic insulation, vibration isolation measures The hall should have good acoustic insulation vibration isolation measures. C. *** vibration, echo, trembling echo, room standing wave, sound focus, sound diffusion: the hall building doors, windows, ceilings, glass, seating, decorations and other facilities shall not be *** vibration phenomenon; hall shall not be echo, trembling echo, room standing wave and sound focus. Defects, sound field diffusion should be uniform.