Acoustic decoration is the use of acoustic principles and the use of decorative materials that meet the requirements for decoration, and to meet the requirements of the relevant professional indicators. General common decoration is also 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! As a conference hall, theater, stadium or performing arts venues, the sound quality is very important - good sound quality, so that people? They can listen to the speaker's speech, and in the sound reinforcement system to play the music in the enjoyment of beauty; on the contrary, after listening to people for a long time, dizziness, brain? Up, upset, more? Do not talk about enjoying the beauty of music.
Architectural acoustic index requirements (acoustic decoration requirements):
A. Background noise? Less than or equal to NR35;
B.? Sound insulation and vibration isolation measures? The hall should have good sound insulation and vibration isolation measures,? Sound insulation and vibration isolation index according to GB3096-82 "urban regional environmental noise standards" for residents of cultural and educational areas, namely: daytime 50dBA, 40dBA at night.
C.? Architectural acoustic indicators?1)? *** vibration, echo, flutter echo, room standing wave, sound focus, sound diffusion:? The hall building doors and windows, ceiling, glass, seats, decorations and other facilities shall not have *** vibration phenomenon; hall shall not appear echo, flutter echo, room standing wave and sound focusing defects, sound field diffusion should be uniform.
2)? Reverberation time
Resonance time is the primary indicator of acoustic decoration to control, is the essence of acoustic decoration, hall sound quality is beautiful, this indicator accounts for the determining factors, is the only scientific instruments can be measured hall acoustic parameters. In fact, if not taken seriously, the reverberation time is not easy to control to the best value, many halls, and even professional theater sound quality is not good, is the reason. Thus, it is not a simple soft package or carpet can solve the problem.
Different halls for different purposes have different reverberation time requirements. This is the global acoustics experts for hundreds of years to summarize, the results of statistics.
A.? Surrounding walls, floor and ceiling should be made of sound-absorbing treatment:
1.? Behind the stage and the wall opposite the stage, should be installed strong sound-absorbing decorative surface;
2.? Windows on both side walls, thick curtains can be installed;
3.? Other parts of the two side walls (including between the windows), should be made to absorb bass wood structure (or the surrounding walls to do this structure of wood wainscoting);
4.? The floor should be installed with wooden floor;
5.? Installation of acoustic ceiling;
B.? Surrounding walls and ceilings should be done sound insulation treatment:
Because there will be all kinds of noise sources outside the public **** hall, such as construction sites, factories, schools, highways, pipelines, etc., or next door is another ? A conference room or office, in order to ensure a good listening environment or office environment, must be strictly sound insulation
1, ? Steel frame lightweight wall structure - steel frame and lightweight wall often have a seam between the wall (especially the roof), easy sound transmission; roof and surrounding wall surfaces must be strictly sealed (especially the roof), the roof and lightweight wall structure, the roof and lightweight wall structure must be strictly sealed (especially the roof). The joint must be strictly sealed (not light sealing, but sound sealing, require sealing at the thickness, thickness and body wall consistent, sealing tight
2,? Light wall structure, simple light steel keel wall - roof and wall is too thin, sound insulation is not very large; roof and surrounding walls should be another layer of ? Sound insulation structure layer, it is recommended that the use of spray foam sound insulation materials or U.S. imports of spray environmentally friendly plant-based sound insulation cotton; with this method, it is not easy to ? There are leftover holes, more rigorous, construction is also convenient, fast;
3,? Ordinary glass windows sound insulation is not very large - recommended the use of thickened windows and insulating glass;
4,? Ordinary door sound insulation is not very large - it is recommended to use thickened doors or specialized sound insulation doors;
5. Pipes through the wall is the weak link - pipelines through the wall is often left with holes, not carefully dealt with, then leave the noise hazard, so that other sound insulation measures have been abandoned. Sound measures are abandoned, and once the decoration is completed, it is a hidden project, which is very bad to find and deal with. It is recommended to use spray foam sound insulation materials. Or U.S. imports of spray-type environmentally friendly plant-based acoustic cotton, not left behind the holes, covering the tight;
6,? Fan piping noise - the city noise is often generated by the air conditioning system fan piping, for this reason, the installation of air conditioning system engineering should? Proposed noise limit requirements, which is often easy to be ignored. If necessary, should produce noise fan piping for professional noise reduction
Perhaps according to the above explanation of what is done can be completed a huge acoustic renovation, if really good is also a very meaningful and valuable use. Above small make up to list no point, we have to pay attention to, otherwise serious words may affect the layout of the whole project, so it is a very technical work, but in general, if you follow the above program to do, really will be successful oh!
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