根据声学理论，构建换流站内相应的声源模型。
According to acoustics theory, the acoustic source model of the station has been constructed.
一些基本的声学理论关于：共鸣体、源和声源滤波的概念。
Some Basic Acoustics of Resonators and Sources, Source-filter Concepts.
解析法是基于波动声学理论，对简单房间体形、简单边界条件来求解的方法。
The way of analytical method is a way by which we can solve to simple room shape and border condition, basing on the theory of wave acoustics.
本文根据严格的声学理论，分析了圆柱面上小孔端面由于辐射所产生的声阻抗率。
In this paper, the acoustic impedance caused by the sound radiation at the terminals of the aperture, which is laid on the cylindrical surface, is analysed on the base of rigorous sound theory.
并根据声学理论分析排气噪声，提出理论上的予计及试验实测压缩机排气噪声的一种方法。
And then, according to the theory of acoustics, the noise of the discharge of a compressor is analysed and a method of prediction and testing of the discharge has been recommended.
从气动声学理论出发，探讨了贯流式风机气动噪声机理及不等节距叶片频率调制降噪的机理。
Based on the theory of airacoutics, the mechanism of denoising of cross_flow fan and the modulation of unequal spaced blades is discussed.
本文首先回顾了传统室内声学理论，并阐释了传统声学理论在地铁站等长空间中的不适用性。
Firstly, the article reviews the theories of the tradition acoustics, expatiates that the theories of the tradition acoustics are unsuitable with the long - room.
本文提出了一个基于心理声学理论和实验的听觉感知模型，它模拟了人对声音响度的听觉感知特征。
Based on the psychoacoustic theory and experiments this paper presents an auditory sense model which simulates the characteristics of human sense of hearing speech loudness.
根据基本声学理论，分析具有单极子、中间和偶极子三种指向性的有限长线声源的几何发散损失特性。
Based on the theory of acoustics, this paper analyzes the character of geometrical spreading loss of finite line sound source on three types of directivity-monopole, intermediate pole and dipole.
根据基本声学理论，分析具有单极子、中间和偶极子三种指向性的有限长线声源的几何发散损失特性。
Based on the theory of acoustics, this paper analyzes the character of geometrical spreading loss of finite line sound source on three types of directivity-monopole, intermediate pole and dipole.
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