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首页> 外文期刊>Journal of Sound and Vibration >Modal-based prediction of sound transmission through slits and openings between rooms
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Modal-based prediction of sound transmission through slits and openings between rooms

机译：基于模态的房间间狭缝和开口声音传输预测

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摘要

The transmission of sound through slits and openings between cuboid-shaped rooms is analysed. A deterministic model that describes the pressure fields inside the rooms in terms of eigenfunctions and uses the Dirichlet-to-Neumann technique in order to reproduce the slit effect is presented. An efficient formulation of the problem is obtained thanks to the splitting of the original domain into three domains: sending room, slit, receiving room. The geometry and boundary conditions of the problem can be modelled in detail like in an element-based numerical technique (such as the finite element method) but with smaller computational costs. The model is compared with numerical solutions, existent models and published experimental data. Afterwards it is used to analyse some aspects such as the influence of slit dimensions, opening position, room properties (dimensions and absorption) that cannot be taken into account with the available models. These usually suppose that the slit or opening connects two unbounded acoustic domains.
机译：分析了通过长方体形房间之间的狭缝和开口进行的声音传输。提出了一种确定性模型，该模型根据特征函数描述了房间内部的压力场，并使用Dirichlet-to-Neumann技术来再现狭缝效应。通过将原始区域分为三个区域，可以有效地解决问题：发送室，狭缝，接收室。可以像基于元素的数值技术（例如有限元方法）一样，对问题的几何形状和边界条件进行详细建模，但计算成本较小。该模型与数值解，现有模型和已发布的实验数据进行了比较。之后，它被用于分析某些方面，例如狭缝尺寸，开口位置，房间特性（尺寸和吸收率）的影响，而这些是可用模型无法考虑的。这些通常假设狭缝或开口连接两个无界声域。

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