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从建筑声学到环境声学   总被引:2,自引:0,他引:2       下载免费PDF全文
孙广荣 《应用声学》2002,21(1):46-49,39
本文简述环境声学的发展过程以及在厅堂音质、环境噪声和噪声控制方面的新世纪展望。  相似文献
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科特迪瓦共和国剧场包括主演出厅、第二演出厅、排练厅和各种配套用房。此外还有科方自建的露天剧场,它构成了供和国首都阿比让市的演出中心,由于三个厅室各有其主要功能、且音质要求较高,故分别进行了声学设计,并对其中的主演出厅作了缩心声学模拟试验,以弥补声学计算上的不足,本报告简述共和国剧场各厅声学设计指标的确定,以及为达到预期声学效果所采取的各项技术措施。  相似文献
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In several auditoria, it has been observed that the reverberation time is longer than expected and that the cause is a horizontal reverberant field established in the region near the ceiling, a field which is remote from the sound absorbing audience. This has been observed in the Boston Symphony Hall, Massachusetts, and the Stadthalle Göttingen, Germany. Subjective remarks on their acoustics suggest that there are no unfavourable comments linked to the secondary sound field. Two acoustic scale models are considered here. In a generic rectangular concert hall model, the walls and ceiling contained openings in which either plane or scattering panels could be placed. With plane panels, the model reverberation time (RT) was measured as 53% higher than the Sabine prediction (frequency 500/1000 Hz), compared with 8% higher with scattering panels. The second model of a 300 seat lecture theatre with a 6 m or 8 m high ceiling had raked seating. In this case, the amount of absorption in the model was increased until the point was reached where speech had acceptable intelligibility, with the early energy fraction, D ⩾ 0.5. For this acceptable speech condition with the 6 m ceiling, the measured mid-frequency T15 was 1.47 s, whereas the Sabine predicted RT was 1.06 s. The sound decay was basically non-linear with T30 > T15 > EDT. Exploiting a high-level horizontal reverberant field offers the possibility of acoustics that are better adapted as suitable for both speech and unamplified music, without any physical change in the auditorium. Using secondary reverberation in an auditorium for a wide variety of music might also be beneficial.  相似文献
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