吸声降噪

吸声降噪效果评价方法探讨。

Adiscussion on the method to evaluate the effects of noise reduction .

拖拉机驾驶室内吸声降噪的试验研究

A Study on the Noise Reduction through Sound Absorption in Weaving Room

为乘员室吸声降噪设计提供指导。

The guidance of acoustic noise design for the passenger compartment is provided .

目前控制噪声的最基本手段是利用吸声降噪材料。

The most basic means of controlling noise is the sound absorption material .

主动吸声降噪理论与方法研究

Research on Theories and Methods of Active Sound Absorption

丁腈橡胶复合材料吸声降噪性能的研究

Study on Acoustic Properties of Nitrile Rubber-based Composite Materials

因此，吸声降噪材料的研究是保护环境的需要。

So , the study on sound absorption material is the need of environment protecting .

基于压电材料的主动吸声降噪方法研究

Research on Active Absorption Using Piezoelectric Material

压电复合阻尼减振材料和压电复合吸声降噪材料中压电陶瓷应用形态研究

The study of shape in application of piezoelectric ceramics to mechanical damping compound and sound absorptive compound

透水性混凝土能吸声降噪，增加车辆行驶及路人行走的安全性和舒适性；

Pervious concrete can absorb sound 、 reduce noise and enhance driving and walking safety and comfort by preventing water spray .

应用各种纤维或织物制成的复合材料或复合结构被证实是有效提高材料吸声降噪性能的途径之一。

Application of fiber or fabric reinforced composite or composite structure has been proved to be effective ways to reduce noise .

第二章分析了开放式办公室的噪声状况，从总体布局、噪声隔绝和吸声降噪三个方面阐述了开放式办公室噪声控制的措施。

Chap. 2 analyzes the noise lever of open-plan office , and provides measures to control noise in total planning , sound insulation and sound absorption .

本文的研究揭示了金属橡胶材料的吸声降噪性能，对金属橡胶材料吸声特性进行了深入的理论和试验研究。

This dissertation does deep research in sound absorption performance of MR from theory and experiment aspects and indicates the sound absorption and noise reduction property of MR.

结果表明，提高空隙率，采用较小最大公称粒径级配的方案都能有效提高沥青混合料的吸声降噪能力。

The research results show that the absorption coefficient of asphalt mixture can be greatly improved by improving air voids and reducing nominal maximum size of aggregate .

通过对透水性路面在吸声降噪及透水性方面的研究，为探讨透水性路面的环境效益指标，透水性路面的环境效益优化设计及其推广应用提供借鉴。

Through research on reducing yawp and penetrating capability of the penetrated pavement , it provides reference to discuss the environmental benefit index , environmental optimizing design and its application .

结果表明金属橡胶具有良好的吸声降噪性能，能够满足现代消声器恶劣环境的吸声降噪需要。

The study results show that metal rubber has a good performance in sound absorption and noise reduction and can meet the needs of a muffler used in awful circumstances .

由于橡胶具有很好的粘弹性的特点，橡胶基复合材料吸声降噪特性研究成为主要的研究方向，也在很多领域有广泛的应用。

Since the rubber has very good characteristics of visco-elastic , the properties of acoustic noise for rubber-based composite material are a major research direction , and have the widespread application in many domains .

本文在对驾驶室内声场特性进行分析的基础上，提出了驾驶室壁面进行吸声降噪处理后，耳旁噪声A声级降噪量的理论计算方法。

This article is on the basis of the analysis to the cab sound field characteristic , proposes the theoretical calculation method of the ear-noise a acoustic level noise reduction amount after the cab wall surface carrying on sound absorption reduction processing .

在音质设计中用于控制混响时间，消除回声、颤动回声、声聚焦等音质缺陷；在噪声控制中用于室内吸声降噪以及通风空调系统和动力设备排气管中的管道消声等。

In the acoustical design , it can be used to control the reverberation time , eliminate echo , flutter echo , sound focusing etc. In the noise control , it can be used in sound absorption and noise reduction in the room .

无砟轨道用水泥基吸声板降噪效果评价

Assessment of the Effects on noise Reduction for Cement-based Noise-absorbing Material on Ballastless Track

介绍了在离心式风机的蜗舌处安装共振吸声器降噪的方法及实验效果。

This paper introduces the method of reducing noise and test effect of sympathetic sound absorber assembled at the wind tongue of fan .

本文对织造车间的噪声进行了调研和测试，对机械和建筑躁声的特点进行了初步分析，得出了在织造车间采用吸声吊顶降噪是必要的和可行的结论。

Having investigated and tested the noises in weaving room while analysing the charateristics of the mechanical noises and echo noises tentatively , the article reached to a conclusion that applying the suspended noises reducing device in weaving room was necessary and feasible .

复合材料泡沫夹芯结构作为一种承载结构，而又有缓冲吸能、吸声、降噪及轻质等优越性能，已被广泛应用于航空、航天、汽车等领域。

Foam-cored sandwich panel as a bearing structure has been widely used in aviation , aerospace , automobile and other fields for its superior performance such as impact-energy absorption , sound absorption , noise reduction etc. , especially for the application in worship building .

通过理论公式对隧道内衬吸声材料的降噪效果进行了计算，结果表明，隧道内衬吸声材料可以有效地降低隧道噪声。

Noise reduction effect of sound absorption materials inside the tunnel was calculated .

铁路直立型与内倾型吸声声屏障降噪效果分析

Analysis of Noise Reduction Efficiencies of Straight-type and Incline-type Absorbing Sound Barriers Along Railway

结果表明，该板具有优异的吸声性能，降噪系数约为0.80￣1.10。

The result indicates that the board has excellent absorbing properties . Noise Reduction Coefficient is around 0.80 ~ 1.10 .

确定了T形和Y形顶部结构各自的适用范围；研究了三种结构添加实用的吸声材料对降噪效果的影响。

The applied range of the T-shaped and Y-shaped top structure was confirmed . The performance of three structures covering sound absorbent material was studied .

传统的噪声控制主要采用隔振、隔声、消声、吸声等被动降噪措施，这些降噪方法对降低中高频段噪声作用显著，但对以低频噪声为主的车内噪声控制效果不佳。

Now , the traditional passive reduction noise measures in automobile , such as noise elimination , sound absorption , vibration and sound isolation , etc , have good effect on reducing the middle and high frequency noise , but little effect on low frequency .

铁路客运专线吸声式声屏障降噪研究

Noise Reduction for Sound Barrier in Railway Passenger Dedicated Lines

共振吸声结构在汽车降噪中的应用

The Application of Resonance Sound - Absorbing Structures in Lowing Noise of Automobiles