大空间人群声学模型

经典扩散声场理论难以适用于大空间建筑。为了探究大空间建筑中人群分布对声场的影响,本文用模拟与实测相结合的方法,提出了一种适用于大空间的人群声学模型,得到了确定等效声源和人群声源的简化方法,以及人群密度与声压级之间、人群总数与发声人数之间的关系。用实测数据对该人群声学模型进行了验证。

Acoustic model of crowd in large spaces

The sound field in large spaces is different from that based on the classic diffuse sound field theory. In order to examine the effects of crowd distribution on the sound field in large spaces, this study established an acoustic model of crowd for large spaces, using the combination of theoretical calculation and actual measurement. With the theoretical calculation, a model for equivalent sound sources for crowd and a simplification model for crowd are developed. With the actual measurement, the relationship between crowd density and sound level and the relationship between the total number of people and the number of the speakers are obtained. Finally, the acoustic model of crowd is validated through measurement.