High density foam core provides insulation and sound attenuation;
高密度海绵内芯有效隔热和隔音；
A brief review is given in this paper for sound attenuation in turbid water.
对混浊水声衰减作了简要的综述。
The results show that sound velocity and sound attenuation is correlated with types of sediment.
结果表明：实验室和现场所得的沉积物声速、声衰减与沉积物的类型密切相关。
It also presents better performance than single aluminum panel in sound attenuation capability and thermal performance.
与铝单板相比具有良好的隔声、保温性能。
The paper study the problem by constructing theoretical model of diffracted sound attenuation of limited length barrier.
通过建立有限长声屏障的绕射声衰减的理论模型，进行了这方面的探讨。
It is shown by the numerical solutions that the face-to-face circumferential distribution has optimum sound attenuation.
计算结果表明，面对面的周向布置声衰减效果最好。
Objective To observe the sound attenuation effect of several kinds of hearing protectors (earplugs and earmuffs) in an infrasound generator sound field.
目的观察几种护耳器（耳塞、耳罩）对次声发生器次声场的隔声效果。
Based on the principle of sound attenuation to measure the sediment concentration of suspensions, the attenuation value of sound pressure must be detected.
基于声衰减原理进行水体含沙量测量的方法，需要测量声压的衰减值。
Perkins does work on sound attenuation materials, for example, laminate materials are evaluated for their ability to reduce resonance of components such as front end covers.
帕金斯不健全的工作衰减材料，例如，复合材料的评价能力，以减少共振的部件，如前端覆盖。
The acoustical properties and specific heat of sample at low temperatures were studied, and the temperature dependences of modulus, sound attenuation and specific heat were obtained.
对其低温的声学和比热容性质进行了研究，得到了样品模量和声衰减以及随温度变化的规律。
The effects on the underwater sound attenuation by the thickness and concentration gradient of polymers were measured in a sound tube at different frequency during the polymers dissolution process.
文中详细研究了梯度高分子溶液在不同频率下，聚合物厚度及梯度结构的变化对反射声衰减效果的影响。
The panels are lightweight and environmentally sound (they are totally recyclable) and provide some noise attenuation.
这些板材具有轻质、环境友好(可完全重复利用)和隔声吸音的性能特点。
In this paper, the principle and primary results of measure ultrasonic sound velocity and attenuation coefficient by ultrasonic syntonic method are introduced.
本文介绍利用超声共振法测量声速和声衰减系数的原理及自来水和乙醇的测量结果。
The linchpin of undertaking high temperature ultrasonic testing is the control of the coupling, attenuation and route of the sound.
在高温状态下，超声波探伤实施的关键在于声耦合、声衰减和声路径的控制。
Objective the variations of the site and shape of focal region for a concave spherical ultrasound transducer in the case of high sound intensity and stronger attenuation were studied.
目的研究凹球面超声换能器的声焦域在高声强和媒质有较大衰减情况下，其形状和几何位置的变化。
The attenuation amount of diffraction of this sound barrie is calculated according to the acoustics principle, the feasible remedies are put forward.
并根据声学原理计算了该声屏障绕射衰减量，提出了切实可行的补救措施。
Objective: Study the influence of parameters such as attenuation coefficient, velocity of sound, and temperature of medium on focusing sound field.
前言：目的：研究声衰减系数、声速、温度等媒质参数对声聚焦的影响。
Ocean sound speed, attenuation, suspended sand size and so on are all important ocean parameters.
海洋声速、声衰减、温度、盐度、悬浮物等都是海水的重要参数。
Attenuation was paid to the study on the sound absorption mechanism of water-soluble polymer during dissolving.
研究了水溶性高分子涂料在其溶解过程中的吸声机理。
In this paper, we discussed the underwater sound reverberation of moving medium, which is a non-stationary stochastic process even after compensating its energy attenuation.
本文讨论了运动介质的水声混响过程，在补偿了能量衰减之后，它仍是一非平稳随机过程。
A lattice gas method is applied to simulate the attenuation of sound oscillation.
采用格子气数值方法模拟了共振腔中气体声振荡衰减过程。
The attenuation of the sound waves leads to a negative exponent pressure gradient.
随着波长的增大或介质黏度的减小，声波的衰减减缓，压力梯度越小。
The experiment showed that in the melon slices there were some points where the sound pressure attenuation coefficient were negative value or zero.
实验表明额隆内有若干点声衰减为负值及零值、意味着声波沿这些点传输时、声压非但不减小反而增大了。
Results Compared with sound velocity and attenuation, the backscatter coefficient could reflect the structural change of biological tissue. The high frequency ul…
结果高频背向散射系数较声速、声衰减更能反映组织结构的变化，高频超声图像具有高的分辨率。
Sound wave consists of different frequency, and the sound wave's attenuation is variety in many different sediments.
不同频率的低频声波在底质中的吸收衰减各不相同。
Sound wave consists of different frequency, and the sound wave's attenuation is variety in many different sediments.
不同频率的低频声波在底质中的吸收衰减各不相同。
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