中、小型厅堂声场均匀度研究

声学参量在声场中的分布情况,影响厅堂的音质效果。以一个中型会议室为例,采用Odeon软件,模拟分析了两种声源情况下,材料的布置与形状对中、小型厅堂声场均匀度的影响。结果表明中、小型厅堂后墙吸声材料的布置对均匀度的影响较小;材料的布置与形状对早期衰减时间(Early Decay Time, EDT)与混响时间T₃₀均匀度的影响较大,而对声压级(Sound Pressure Level, SPL)、明晰度C₈₀、清晰度D₅₀与语言传输指数(Speech Transmission Index,STI)均匀度的影响较小;声源对EDT、SPL、D₅₀与STI均匀度的影响较大,而对T₃₀与C₈₀均匀度的影响较小。研究结果可为中小型厅堂的音质设计和研究提供参考。

Research on sound field uniformity in medium and small Halls

The distribution of acoustic parameters in sound field affects the sound quality of the hall.By taking a medium sized meeting room as an example and using Odeon software,the effects of material layout and modeling on the sound field uniformity in small and medium-sized halls are simulated and analyzed under two sound sources.The results show that the arrangement of sound-absorbing materials on the back wall of small and medium-sized halls has little effect on the uniformity;the arrangement and shape of materials have a greater effect on the uniformities of early decay time(EDT)and reverberation time(T₃₀),while have little effect on the uniformities of sound pressure level(SPL),clarity(C₈₀),definition(D₅₀)and speech transmission index(STI);the sound source situation has a greater impact on the uniformities of EDT,SPL,D₅₀ and STI,but has a small impact on the uniformities of T₃₀ and C₈₀.The research results can provide references for the sound quality design and research of small and medium-sized halls.