acoustic material

To use ceramisite in acoustic material for underground tunnel

利用陶粒制备地铁吸音材料

The homogeneity reference material is studied by acoustic emission method for composite solid propellant burning rate.

采用声发射燃速测试方法研究了复合固体推进剂方坯燃速的均匀性.

A Research on the Acoustic Material Based Polyurethane Hybrid Composite Foam

聚氨酯杂化复合泡沫体声学材料的研究

Acoustic emission is the characteristic and irreversible sound emitted by a material when it is deformed.

声发射是当材料变形时所发出的特殊的不可逆的声响.

Study shows that LGS crystal is a kind of good piezoelectric material 、 electro-optic material and surface acoustic wave ( SAW) material.

研究表明，硅酸镓镧晶体是一种性能优异的压电材料、电光材料和声表面波材料。

Investigation on Fast Reconstructing Reflection Coefficient from Big Acoustic Material Samples by NAH

声学材料大样声反射系数声全息快速反演方法研究

Rubber is an important underwater acoustic material.

橡胶是一种重要的水声学材料。

One of the important factors in evaluating the performance of the acoustic material is the sound absorption coefficient.

而评价吸声材料和结构的重要参数之一是吸声系数。

Study on a New Kind of Marine Acoustic Reflecting Material

一种新型水声反声材料的研究

Acoustic properties and material systems of polyurethane for use as towed linear sonar jacket

拖曳线列阵声纳护套用聚氨酯的声学性能及材料体系

First, this paper makes a review of the acoustic material technology, include acoustic and acoustic material on the basis of knowledge, and explain the plane wave catheter theory.

首先，综述了声学材料技术的进展，包括声学及声学材料基础知识的介绍，并对平面波的声波导管理论作了简要的阐述。

Through investigation, found that the most serious problem is formaldehyde's content which mainly volatilize from acoustic insulation material.

经调查研究发现有害气体中超标最为严重的是甲醛含量，而其来源主要是汽车内饰用的隔音棉。

The basic acoustic parameters of material include the velocity, attenuation coefficient and acoustic nonlinear parameter B/ A, etc. They all play important roles in the non-destructive test, ultrasonic tissue-mimicking materials properties testing and medical imaging.

材料的基本声学参数包括声速、声衰减系数、非线性声参量B/A等，它们在无损检测中的缺陷定位，仿组织材料的超声特性检测，以及医学成像中都有重要意义。

So, it is important to do research on the acoustic material.

因此吸声材料和结构的研究对噪声控制具有重要意义。

Isolating-sound and decoupling coating is a important underwater acoustic material and structure, and it is coated the outer surface of the submarine body which is used to support sound press.

隔声去耦覆盖层是一种重要的舰船水声材料与结构，敷设于潜艇艇体耐压壳外表面。

With the development of underwater acoustics, underwater acoustic material is used more and more extensively in military and civil field.

随着水声科学与技术的发展，水声材料在军用和民用方面的应用越来越广泛。

The experiments show that there exist very close relation between the phenomenon of acoustic emission and material fracture.

试验表明，声发射现象与材料破裂具有十分密切的关系。

Technique of acoustic emission for concrete material

混凝土材料声发射技术研究综述

Primary Study of Bending Resonance Test Method of Acoustic Material Damping Property

声学材料阻尼性能弯曲共振试验方法初探

In applied acoustics field, the sound absorption measurement of an acoustic material and structure is always an important and basic task.

在应用声学领域，声学材料与结构的吸声测量始终是一项重要的工作。

The acoustic material is an effective measure which could reduce noise and improve acoustic environment.

声学材料是降低噪声,改善声环境的有效措施.

Based on acoustic microscope technology, material elastic constants are determined by measuring longitudinal wave and leak surface wave velocity simultaneously.

系统基于声学显微镜技术，利用同时测定纵波和漏表面波波速来表征材料的弹性常数等，既适用于各向同性材料，又适用于各向异性材料。

Polyurethane foam ( polyurethane foam, PU) is a typical porous acoustic material, which combines the material properties of the polymer and the damping function of a flexible material, is a good sound-absorbing material.

聚氨酯泡沫（polyurethane foam，PU）是典型的多孔型声学材料，它综合了高分子的材料性能、柔性材料的阻尼功能、多孔材料的吸声功能，是一种很好的吸声材料。

Study on acoustic emission of non-homogeneous material by image processing method

用图像处理方法研究非均质材料的声发射

Acoustic material components are widely used, and they are vital underwater parts in acoustic engineering. Different application backgrounds have different requirements on acoustic materials performance.

水下声学材料构件是水声工程中使用广泛且至关重要的水下部件，不同的应用背景对材料声学性能有特殊的要求。

Quality Controls of Decoration Construction of Acoustic Noise Material Measurement code for airborne sound insulation of dwellings

隔声吸声材料的装饰施工与质量控制住宅建筑空气隔声测量规范

Acoustic material and heat-resisting heat-storing material is filled in the porous inner tube and the housing body.

在多孔内管和外壳体中间填充有吸音材料和耐热蓄热材料。

This paper presents the principle of the circuit of an acoustic-emitter by use of which preliminary testing approaching have been made to various experiments for rock models and the phenomenon of acoustic emission ia material testing.

本文介绍了一种自制的声发射仪线路原理，并应用它对室内外各种岩石力学试验，模型试验和材料试验中的声发射现象进行了初步测试和探讨。

The noise is reduced clearly by using fuzzy identify method, acoustic insulating material and orienting the noise source accurately.

运用模糊识别的方法，精确定位噪音源；采用消音材料、装置等显著降低各类噪音。

First of all, design of acoustic material.

第一，声学材料的设计。