sound absorption

The aim was to research the sound absorption properties of graded polyurethanes at incident angles.

主要研究梯度聚氨酯在全入射角下的吸声性能.

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Studies on Sound Absorption Coefficient on Polymer Damping Materials

聚合物阻尼材料的吸音系数研究

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Research on sound absorption property of Al-Si closed-cell aluminum foam

铝硅闭孔泡沫铝吸声性能研究

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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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That material showed the characteristics of good sound absorption, low cost of preparation and non-pollution to the environment.

该种材料具有吸声性能好、成本低、对环境无污染等优点。

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It features temperature resistance, good insulation, sound absorption and high cleaning efficiency of exhaust gas.

具有耐热温度高 、 保温性能好、吸音率大、尾气净化效率高的特点,是理想的空气净化 、 隔热、保温材料.

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It indicates that straw-based wallboard has characteristics of low density, good heat insulation and sound absorption.

笔者综述了3种墙体材料生产工艺 、 产品性能及其用途的研究现状和发展趋势.

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A study on sound absorption properties of large-cavity perforated structure

大空腔穿孔板吸声结构的吸声特性

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Through analyzing and computing satisfy environmental noise criteria, a sort of noise absorption wall and sound insulation wall are introduced, which obtained good effect. It has reference value for outdoor machine design in air conditioning system.

在分析和计算了要满足环境允许噪声标准后，给出了一种吸音墙体和隔声挡墙的设计实例，达到了良好的治理效果，对空调系统室外机设计有参考价值。

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This method can be used as one of the common measurement methods of sound absorption coefficient.

可以做为常用的测量吸声材料的吸声系数的方法之一。

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The deformation of the micro-holes can be obviated by arranging ribs and concave regions on the lamp-box fabric so as to keep good sound absorption performance.

利用灯箱布的凸筋和凹区保证微穿孔不受压变形，保持其良好的吸声性；

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The internal organization of materials, products ( EPS polystyrene particles) has a good sound insulation and sound absorption capabilities.

产品内部组织材料（EPS聚苯乙烯颗粒）具有良好的隔音性能和吸音等功能。

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Research on Mining-induced Water Resisting Property of Clay Aquiclude in Shallow Seam The Study on Sound Insulation and Sound Absorption Capacity of Metal Heat Preservation Sandwich Panels

浅埋煤层粘土隔水层的采动隔水性研究金属面保温夹芯板的隔声吸声性能的研究

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An adaptive control approach applied to practical active sound absorption systems is presented.

研究了实际系统中有源声吸收自适应控制方案。

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In the design of music halls, cinema and multi-functional hall etc, the sound absorption structure play an important role in the acoustical design and noise control, that has obtained the very widespread application.

在音乐厅、电影院、多功能厅等的设计过程中，吸声结构作为音质设计和噪声控制的主要技术手段，获得了非常广泛的应用。

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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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Analysis on the difference between sound absorption and noise insulation in the architectural acoustics

试析建筑声学中的吸声与隔声

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Based on the assumptions that indoor acoustic field spread fully and decayed equally, Sabin proposed that the reverberation time is proportion to room's volume, inverse proportion to the volume of sound absorption in the room.

赛宾根据室内声场是充分扩散和声场是均匀衰减的假定，提出混响时间与房间容积成正比，与房间内总吸声量成反比。

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At present, traffic noise and construction noise are particularly acute, most commonly used high-density materials such as iron and steel, metal sheet often have good sound insulation property whereas poor sound absorption property.

目前，交通与建筑噪声尤为严重，经常使用的一些高密度材料如钢铁、板材具有良好的隔声性能而吸声性能通常较差。

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High-grade passenger car abroad adopts floating floor with high performance of vibration absorption and sound insulation.

国外 高档 客车均采用浮筑地板,浮筑地板具有良好的减振、隔声性能.

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The sound absorption coefficient would be increased with the increasing of the washing time.

洗涤次数增加，吸声系数也随之增大。

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The sound absorption coefficient of the material was tested by standing wave tube method.

采用驻波管法测试材料的吸声系数.

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Research on Sound Absorption Characteristics of the New Acoustic Structure

新型声学结构的吸声特性研究

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Experimental Investigation on Measuring the Coefficient of Sound Absorption in Turbid Water

混浊水声吸收系数的试验测量研究

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Polyurethane foam is a type of foam materials with isocyanate and polyether ( or polyester) polyol as principal components, processed via special foaming technics, which possesses the excellent properties of light weight, heat insulation, sound absorption and shockproof etc.

聚氨酯泡沫塑料是以异氰酸酯和聚醚（或聚酯）多元醇为主要成份，经特殊发泡工艺制作而成的泡沫材料，具有质量轻、隔热、吸音、防震等优良性能。

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Theoretical research on active sound absorption in space

空间有源声吸收的理论研究

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Adding the airspace can improve the sound absorption properties under low frequency.

增加空腔可以提高材料在低频的吸声性能；

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Infrared absorption methane concentration alarming device is comprised of microcontroller systems, light modulation module, signal conditioning module, digital display module, sound and light alarm module, remote control receiving module, standard output module interface circuit.

该红外吸收式的甲烷浓度报警器由单片机系统、光源调制模块、信号调理模块、数码显示模块、声光报警模块、遥控接收模块、标准频率输出模块等电路组成。

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Transfer Function Method of Sound Absorption Coefficient in Impedance Tubes

阻抗管中吸声系数的传递函数测量法

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Much has been done on absorption of sound in water fog.

关于水雾对声波的吸收作用,前人已做了大量的研究工作.

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