Abstract Uncertainty of the final results of room acoustic modelling is a result of uncertainties of many model input parameters, which have to be discovered and limited if possible. It can be done by model calibration. In this paper, a detailed procedure of room acoustic model calibration is proposed. It is based on detection and limitation of possible sources of discrepancies between measured and simulated selected room acoustic parameters defined in ISO 3382-1 standard. As independent parameters which describe the variability of the acoustic field in the room the most accurately, clarity C80 and early decay time EDT are suggested. Based on uncertainty analysis, sound absorption coefficients of all materials used in the interior and selected sound scattering coefficients as well as positions of the receivers are chosen to be input parameters adjusted in the model calibration process. Correction of these parameters is done using optimization algorithms in order to accelerate the procedure. Methods for choosing key ray-tracing simulation parameters are presented, according to which it is possible to obtain repeatable results in the shortest possible time. All analyses are done for five different interiors (three philharmonics and two churches). Correctness of sound absorption/scattering coefficients calculated in the calibration process is validated in the comparison of simulation and measurement results, using a different sound source position. Obtained results are specific for analysed rooms, but proposed methodology is universal for all kinds of room acoustic models.

中文翻译：

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基于优化的几何声学模型校准方法

摘要 室内声学建模最终结果的不确定性是由许多模型输入参数的不确定性造成的，必须尽可能地发现和限制这些参数。它可以通过模型校准来完成。在本文中，提出了房间声学模型校准的详细程序。它基于对 ISO 3382-1 标准中定义的测量和模拟选定房间声学参数之间可能的差异来源的检测和限制。作为最准确地描述房间内声场变化的独立参数，建议使用清晰度 C80 和早期衰减时间 EDT。基于不确定性分析，选择内部使用的所有材料的吸声系数和选定的声散射系数以及接收器的位置作为模型校准过程中调整的输入参数。这些参数的校正是使用优化算法完成的，以加速该过程。介绍了选择关键光线追踪仿真参数的方法，根据这些方法可以在最短的时间内获得可重复的结果。所有分析都针对五个不同的室内设计（三个爱乐乐团和两个教堂）进行。校准过程中计算的吸声/散射系数的正确性在模拟和测量结果的比较中得到验证，使用不同的声源位置。获得的结果特定于分析的房间，