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吸声效果
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  sound absorption effect
     Proceed fromimfluence factor of traffic environment, the peper introduce initial mix ? areato modify parametes of tail gas diffusion, and applying ideal ground modelto eaculate sound absorption effect.
     从交通环境影响因素出发,引入初始混合区的概念修正尾气扩散参数,应用理想大地模型计算地面吸声效果
短句来源
     The results show that the appropriate combination of sound absorption materials and sound absorption structures can improve the sound absorption effect,and the absorption broadband is widened.
     结果表明,吸声材料与吸声结构的有机结合显著提高了结构的吸声效果,拓宽了吸声频带宽度。
短句来源
  sound absorbing effect
     The results show that as the compounding agent A content is 0.6%(mass), the scorching of the modified damping rubber is excellent, it increases by a factor of 5 in solvable time, and the sound absorbing effect of the modified damping rubber increases by a factor of 50%.
     研究结果表明 ,复合助剂 A的含量为 0 .6 %时所改性的阻尼橡胶具有较好的焦烧性能 ,能溶解的时间提高了 4倍。 同时 ,其改性阻尼橡胶的吸声效果提高了 50 %。
短句来源
  “吸声效果”译为未确定词的双语例句
     About material thickness,6 cm is perfect.
     材料厚度对吸声性能的影响 ,6 cm为最优值 ,此时材料的吸声效果最好 ;
短句来源
     As showed from the results of the practical testing after the application of reducing-noise materials, the reducing-noise quantity of quieter concrete pavement is 1.7dB~3.8dB and that of the absorption wall is 5.5~7.6dB. Compare with the treated and untreated experimental fields, the chaos time at 1000Hz
     隧道处理路段的降噪效果现场检测结果为,20mm吸声壁面的吸声效果是5.5~7.6dB,低噪音路面的减噪量为1.7dB~3.8dB。 对比于与处理前后的混响时间情况,得到处理路段的混响时间在中频范围下降较明显,在1000Hz时处理前后混响时间分别为6.45和2.17。
短句来源
     Objective function is founded and optimization program of genetic algorithm is edited. The sound absorption coefficient of the polymers is optimized using this program. Results show that the sound absorption coefficient of the polymers with negative Poisson's Ratio is larger than that of the polymers with positive Poisson's Ratio.
     主要优化高分子材料的动态力学性能参数、密度及泊松比,使其在所研究的频率范围内具有最大的吸声系数.建立了目标函数,编辑了遗传算法优化程序,在不同泊松比取值范围内优化了高分子材料的吸声系数.优化结果表明:负泊松比高分子材料的吸声系数明显大于正泊松比高分子材料的吸声吸声系数.因此,负泊松比高分子材料具有优良的吸声效果
     The sound absorption coefficient in air were determined by Standing Wave Tube method. The influence of pore structure of porous aluminum is also studied. It shows that the sound absorption coefficient increases with the decrease of pore diameter and the increase of sample's thickness.
     采用负压渗流法制备了多孔铝,利用驻波管法测量了它在空气中声吸收系数,并考查了多孔铝的孔结构对吸声性能的影响,分析了吸声机理.研究发现多孔铝的吸声系数随孔径的减小和试样厚度的增加而增大,当孔隙率达到某一临界值时,可获得最佳吸声效果
短句来源
     The theoretical model of the proposed active surface is firstly established,and then by solving response of the cavity_structure coupled system,an analytical expression for calculation of reflected acoustic power is derived based on the nearfield approach,and the optimum sound reduction in the reflected sound power before and after control are obtained using the active minimization strategy.
     文章首先建立理论模型 ,然后通过近场方法和求解弹性板 -声腔耦合系统结构响应推导了有源控制前后反射声功率的计算公式 ,然后按声反射功率最小化准则求得最佳有源吸声效果
短句来源
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  相似匹配句对
     Application on Sound Reduction Effect of Sound Absorption
     吸声尖劈消声效果的应用
短句来源
     Influence of the Structural Form of Sound Absorbing Material on the Behavior of Sound Absorption
     吸声材料构造形式对吸声效果的影响
短句来源
     What about the effect?
     效果如何?
短句来源
     The result is good.
     效果是好的.
短句来源
     Design of Sound Absorbing Resonator Made of Perforated Plate
     共振吸声结构的设计
短句来源
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It is pointed out that the additional a-o diffraction is caused by reflected acoustic waves, and this phenomenon is explained from the following aspects: the distribution of reflected acoustic waves (longitudinal and transverse waves), their intensities, the diffraction angles of light, and the difference of a-o diffraction characteristies between acoustic longitudinal waves and transverse waves for the plane-polarized light. The results of experiments are in accordance with the analytical ones. The author believes...

It is pointed out that the additional a-o diffraction is caused by reflected acoustic waves, and this phenomenon is explained from the following aspects: the distribution of reflected acoustic waves (longitudinal and transverse waves), their intensities, the diffraction angles of light, and the difference of a-o diffraction characteristies between acoustic longitudinal waves and transverse waves for the plane-polarized light. The results of experiments are in accordance with the analytical ones. The author believes that using these phenomena, an effective method for checking sound absorption can be provided.

本文指出,体波声光器件中的附加声光衍射现象是器件中的反射声波引起的,并从反射声波(纵、横波)的分布、强度、衍射光角度以及声纵波与横波对平面偏振光呈现不同的声光衍射特性等方面解释了这些现象。分析与实验结果是符合的。利用这一现象,可为检验吸声效果提供一个有效的方法。

This paper deals with some major factors concerning sound absorptivity of same kinds of wood based panels.Factors affecting the sound absorbing capacity of those panels are thickness,density surface quality,thickness of air layer,percentage of holes punctured,decoration performances and so on.Results revealed that sound absorbing copacity can be improved by the regulation of panel thickness or densities during manufacturing process.Sound absorbing capacity can be improved by increasing the air layer thickness.Increasing...

This paper deals with some major factors concerning sound absorptivity of same kinds of wood based panels.Factors affecting the sound absorbing capacity of those panels are thickness,density surface quality,thickness of air layer,percentage of holes punctured,decoration performances and so on.Results revealed that sound absorbing copacity can be improved by the regulation of panel thickness or densities during manufacturing process.Sound absorbing capacity can be improved by increasing the air layer thickness.Increasing air layer thickness renders the panel thickness to be increased.The sound absorbing capacity also related to panel density.The lower the density is,the more sound energy it can absorb.Thus decreasing the density will improve sound absorbing capacity to a certain extent.Besides there are some other factors including varieties of materials,structures of panels,diameters and depths of punctured holes,Surface decorative materials etc.The optimum density varies with different kinds of panels,for softbo-ard it ranges from 0.230 to 0.260g/cm3,for cement particleboard from 0.55 to 0.65g/cm3. Sound absorbing capacity varies with the percentage of holes,High percentage brings about better results,because more sound energy can be absorbed by the wall of holes,and noise is reduced.Holes should be punctured before surface treatments,Otherwise efficiency will be lowered.

木质人造板是一种广泛应用的工程材料。它本身具有一定的吸声特性,不同种类的人造板采用特殊的生产工艺或加工处理后,可进一步改善其吸声效率。本试验就人造板的厚度、容重、表面加工、表面装饰及背后空气层的厚度等因素和吸声性能的关系进行了此较全面的研究。研究表明:人造板的特性和吸声性能有密切的关系,正确地控制各种人造板的生产工艺和产品特性,对改善其吸声效率有重要的作用。人造板的厚度及容重对其吸声效率有明显的影响,软质纤维板的容重在0.230—0.260克/立方厘米范围内;水泥刨花板的容重在0.55—0.65克/立方厘米(板厚35—55毫米)时,其吸声效果是比较理想的。人造板表面经过穿孔处理;或在背后增加空气层等方式控制后,可有助于改善其吸声效果。表面经装饰处理后,人造板的吸声效率是下降的。

The widely used high sound absorbing material at present usually consists of fiberglass, mineral and rockwool and so on. These absorbers are complex structures and difficult to construct. This paper suggests a combined absorber in which expanded perlite is filled in honeycomb. It has some advantages of high sound absorbing coefficient, high rigidity, fire-resistance, withstand impact and convenient to construct. The influence factors of absorbing property have been studied in this paper. Such new absorbers have...

The widely used high sound absorbing material at present usually consists of fiberglass, mineral and rockwool and so on. These absorbers are complex structures and difficult to construct. This paper suggests a combined absorber in which expanded perlite is filled in honeycomb. It has some advantages of high sound absorbing coefficient, high rigidity, fire-resistance, withstand impact and convenient to construct. The influence factors of absorbing property have been studied in this paper. Such new absorbers have been applied in some practical work, and good results are obtained.

目前广泛使用的强吸声体是由纤维性玻璃棉,矿棉和岩棉等组成.构造较复杂。本文提出一种纸蜂窝内填充膨胀珍珠岩的复合吸声体,它具有吸声系数高,刚度大,耐燃.能承受撞击作用和施工简单等特点。本文对影响吸声效果的因素进行了实验研究。该吸声体已在实际工程中应用,性能良好.

 
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