Zhengzhou multimedia system installation company

Zhengzhou multimedia system installation company {Zhengzhou Wei Xiao Xu Xin Trading Company 13,140,021,039 18,039,281,707 0371-61200123 66668652 Website: www.zzwxsm.com URL: zzwzyyx@163.com} K as reference variable room shape, and generally 0.161; V for the room volume (m?); S is the room sound absorption on the total surface area; a is an indoor average absorption coefficient; specific calculation methods are as follows (m?): α = (ΣS i α i + ΣN j α j) / S Where: S - Interior total surface area; S i - indoor surface area of ??each part; α i - Si surface corresponding absorption coefficient; N j - the number of persons or objects; α j - corresponding to Ni The absorption coefficient. M for the sound attenuation coefficient in air; approximately 70% relative humidity: 1000Hz 0.0012 4000Hz 0.0062 6000Hz 0.0134 8000Hz 0.0200 10000Hz 0.0250 T is the reverberation time (s); conference room height about 4m in the case, the volume < 200m3 best reverberation time of 0.3 ~ 0.5s, 200 ~ 500m3 when 0.5 ~ 0.6s, 500 ~ 2000m3 of 0.6 ~ 0.8s. Fourth, the meeting room supply system to ensure the safety of the conference room and reliable power supply system to reduce the power approach brought by electrical crosstalk should be used three sets of power supply system. A power supply system as a conference room lighting power supply; second power supply system as a whole terminal equipment, control room equipment, and the use of uninterruptible power systems (UPS); the third set of power supply systems and other equipment used to power air conditioning. Power system grounding is the more important issue. Control room or computer room, meeting room required for the ground, should be in the control room or room connection of a grounding bus. If it is set individually grounding, grounding resistance should be greater than 4W; setting separate grounding is difficult, but also in combination with other grounding system grounding, grounding resistance should not exceed 0.3W. It must be emphasized that the use of combined grounding way to protect the earth must be three-phase five-wire lines in the fifth, and the alternating current neutral must be strictly separated, or zero unbalanced power line will have a serious image interference. {Zhengzhou Wei Xiao Xu Xin Trading Company 13,140,021,039 18,039,281,707 0371-61200123 66668652 Website: www.zzwxsm.com URL: zzwzyyx@163.com}