传声损失

一种用于阻尼夹层板传声损失（TL）计算的等效参数法

The Equivalent Parameter Method for Sound Transmission Loss Calculation of Damped Sandwich Panel

首先，运用GT-Power软件对几种主要类型的消声器进行传声损失的计算，通过改变其结构参数，找出增大低频消声量的因素，再结合理论分析，最终得出降低低频噪声方法的结论。

Then the accuracy of the conclusion is verified . Firstly , the GT-Power software is used to calculate the transmission loss of several main kinds of mufflers by changing the parameters of their structures . Then the factors of increasing low frequency noise deadening capacity are identified .

建立空气滤清器的CAD模型和声学边界元模型，通过声学仿真的方法计算了空气滤清器的传声损失。

The CAD model and the boundary element model were founded .

本文用混响室消声箱法对具有不同几何和物理参数配置的弹性粘弹性阻尼复合板传声损失（TL）进行了系统的实验测量。

In this paper , the measurement of sound transmission loss ( TL ) is carried out with " reverberant chamber-receiving box approach " for elastic - viscoelastic laminated damping panels ( EVLDP ) with varying geometric and physical parameters .

基于传递函数的消声器传声损失测量技术研究

Measurement of transmission loss of a muffler based on transfer function

计算了多种噪声源传声损失频率特性，并讨论了主要参数对反声的影响。

Then the influences of main parameters on anti-sound are discussed .

膨胀室消声器传声损失的频率响应

Frequency response of sound transmission loss for noise silencers of expansion chamber

基于传声损失的双层隔声窗参数的优化设计

The Optimization Design of Parameters of Double Window Based on Transmission Loss

单层隔声窗传声损失的分析

Analysis of sound transmission loss of single window

阻尼复合板的结构参数配置与传声损失

Dependence of Sound Transmission Loss Characteristics of Elastic-viscoelastic Layered Damping Panel on Its Structural Parameters

对改进消声器进行了传声损失、插入损失试验。

The transmission loss and the insertion loss experiments of the improved muffler are done .

同时，将双传声器驻波管测量材料声阻抗的原理，推广到四传声器法测量压缩机消声器的传声损失。

Based on the test technique of standing wave tube with double microphones , a four-sensor method is developed .

通过对某种发动机使用的消声器进行测试，对消声器的静态传声损失性能作出评价。

Through testing on muffler on a certain motor , the paper evaluates the static performance of sound transmission loss of the muffler .

通过计算得到：水层厚度的增加使结构传声损失增大；

The conclusions are drawn by calculation : with the increase of the thickness of water layer , the STL of structure is enhanced significantly ;

采用适当的人工边界条件来描述排气口外部的半无限空间，通过进气口端正弦扫频激励，可求得出口端的响应，从而获得该排气消声器系统的传递函数和传声损失。

The acoustical transfer function and transfer loss of exhaust muffler can be obtained by using chirp signal as excitation at the inlet of exhaust muffler .

对传声损失进行了模拟计算，计算结果与实测结果基本一致。

Simulating computation of sound transmitting loss has been carried out , of which the result is practically the same as that by substantial measurement # .

板厚或肋骨惯性矩的变化会引起结构传声损失曲线上隔声低谷位置的变化；

The position of minimum values on the sound transmission loss curve varies with the changes made on plate thickness and the moment of inertia of stiffeners .

应用管道中声传播理论和四极子理论导出带插入管的单膨胀室的传声损失。

Applying the theory of acoustic transmission in a tube and the quadripole we deduce the transmission loss of a single expansion chamber with a insert tube .

而当声波从空气经结构向水中传递时，增大板厚或肋骨惯性矩也增大了结构的传声损失，但效果明显不如当声波从空气经结构向空气中传递时显著。

An increase in the plate thickness or the moment of inertia of stiffeners reduces the sound transmission through stiffened plates markedly from air to air and mildly from air to water .

增大板厚或肋骨惯性矩可增大结构的传声损失，特别是当激励频率低于结构基频时，可通过增大板厚或肋骨惯性矩来增大结构刚度进而明显增大结构的传声损失。

An increase in the plate thickness and the moment of inertia of stiffeners increases the sound transmission loss , especially while the excitation frequency is below the fundamental natural frequency of the plate .

利用这些方法，可以获得比传统方法更丰富的信息，与传声损失总值一起应用，可完整地评价消声器的声学性能。

By means of the methods , more information can be obtained than by traditional ones . The methods , together with total transmission loss , can be used for evaluating integrally acoustic characteristics of muffler .

研究表明隔声窗在低频附近传声损失曲线显示振荡的特性，在中频附近则显示平稳的增长趋势，玻璃厚度的增加同样会增加隔声窗的隔声性能。

The results indicate that TL curve shows fluctuation around the low frequencies , but steady increase near the middle frequencies , and the capability of the sound insulation will be enhanced with the increase of the window 's thickness .