acoustic material

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。

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First of all, design of acoustic material.

第一，声学材料的设计。

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Study on a New Kind of Marine Acoustic Reflecting Material

一种新型水声反声材料的研究

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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。

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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

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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。

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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.

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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。

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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。

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Technique of acoustic emission for concrete material

混凝土材料声发射技术研究综述

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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.

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Rubber is an important underwater acoustic material.

橡胶是一种重要的水声学材料。

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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。

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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

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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。

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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。

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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

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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。

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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

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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。

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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

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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。

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To use ceramisite in acoustic material for underground tunnel

利用陶粒制备地铁吸音材料

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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

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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。

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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。

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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。

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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。

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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.

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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。

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