Abstract Nowadays, historical opera houses are also employed for symphonic music, especially in a country like Italy where they are far more widespread than concert halls. The aim of the work presented here is to modify the acoustic conditions of an opera house by introducing an overhead reflector array and removing drapes from the stage, so to meet the requirements for an orchestral performance. The design process and the shape optimisation of the canopy layout were developed with a Geometrical Acoustic (GA++) model. In-situ acoustic measurements were used to calibrate the model, to adjust the tilt angles of the panels and to validate the software–aided design. Combining theoretical studies with practical needs, the results of this work give the opportunity to investigate the consequences of placing a reflector array in an opera house. A multi-decay analysis on measured impulse responses shows that the reflector array enhances the acoustic coupling between the stage house and the main hall. Finally, the blending effect on the orchestral sections caused by the reflector array was estimated through a simulation employing calibrated virtual instruments.

中文翻译：

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增强歌剧院交响乐团的实力

摘要 如今，历史悠久的歌剧院也被用于交响乐，尤其是在像意大利这样的国家，它们比音乐厅更普遍。这里展示的工作的目的是通过引入高架反射器阵列和去除舞台上的窗帘来改变歌剧院的声学条件，以满足管弦乐队表演的要求。顶篷布局的设计过程和形状优化是使用几何声学 (GA++) 模型开发的。现场声学测量用于校准模型、调整面板的倾斜角度并验证软件辅助设计。将理论研究与实际需要相结合，这项工作的结果为研究在歌剧院中放置反射器阵列的后果提供了机会。对测量的脉冲响应进行多次衰减分析表明，反射器阵列增强了舞台和主厅之间的声学​​耦合。最后，通过使用校准虚拟仪器的模拟来估计反射器阵列对管弦乐部分的混合效果。