立体声电影院的吸声装置

Sound-absorbing device of the stereophonic cinema

立体声电影院的音质设计,不仅应满足最佳混响时间T60的要求,而且要达到ISO2969的评价标准。市场上通用的吸声材料常为多孔型和空腔共振型,多孔型吸收峰值在高频段,空腔共振型吸收中低段,各频率吸声系数在0.6以下。因此,选择市场上通用的吸声材料,立体声电影院的音质设计是不可能达标的。文章将上述理论与实践相结合,设计了吸声装置,找到了立体声电影院的音质设计中达标困难的原因。

The acoustical design of stereophonic cinema should not only satisfy the best reverberation time T60 but also reach the evaluation standard of ISO2969. The general materials in the market are usually cellular and resonant. The cellular material absorbs the high frequency sound while the resonant material absorbs the low and moderate frequency sound,and the sound absorption coefficient in every frequency is under 0.6.So in the acoustical design of stereophonic cinema,the general material in the market can not be used. Based on the theoretical analysis and practical experience,the sound-absorbing device is designed,and the related problems are solved.