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acoustical performance
相关语句
  声学性能
     making test of acoustical performance for the transducer: resonance frequency is 1.16 kHz in water, bandwidth is 680 Hz, mechanical quality factor is 1.71,unit electric current transmitting response reach to 186.1 dB,electromechanical efficiency is 13.1%.
     对换能器的声学性能作了测试:水中诸报频率为1.16kHz,带宽为680Hz,机械品质因数Qm为1.71,单位电流发射响应在谐振频率处达到186.1dB,电声效率为13.1%.
短句来源
     ANALYSIS OF ACOUSTICAL PERFORMANCE OF ACTIVE NOISE ATTENUATORS IN FLOW DUCT
     气流管道有源消声器声学性能分析
短句来源
     Study on acoustical performance of a ventilation and sound insulation window using transfer matrix method
     通风隔声窗声学性能的传递矩阵法分析
短句来源
     The noise of propeller is the main source in the warship noise. To predict the noise of the warship propeller is significant for estimating the propeller′s acoustical performance and designing low noise propeller.
     螺旋桨是舰船主要的噪声源,螺旋桨噪声的预报对评价螺旋桨声学性能及螺旋桨声学设计有非常重要的意义。
短句来源
     The main steps and formulae are discussed to analyze acoustical performance of a ventilation and sound insulation window using a transfer matrix method.
     详细介绍应用传递矩阵方法分析通风隔声窗声学性能的基本思路和相关公式;
短句来源
  “acoustical performance”译为未确定词的双语例句
     STUDIES OF ACOUSTICAL PERFORMANCE OF PERFORATED ABSORBENT PIPE MUFFLER
     穿孔声管消声器消声性能研究
短句来源
     It's characteristics which are simple technology,low cost unit volume and good acoustical performance at both medium and low frequencies can make it be extensively used as building materials and adorning materials and so on.
     它具有成本低、工艺简单的特点。 这使它在建筑材料和装饰材料等行业中具有广阔的应用前景。
短句来源
  相似匹配句对
     Investigation and Analysis on Acoustical Environment of Pingtan Performance
     评弹演出听闻环境的调查与分析
短句来源
     STUDIES OF ACOUSTICAL PERFORMANCE OF PERFORATED ABSORBENT PIPE MUFFLER
     穿孔声管消声器消声性能研究
短句来源
     Performance appraisal
     销售业务员工作高效的发动机——绩效考核
短句来源
     NET performance.
     NET网站性能。
短句来源
     The acoustical properties of Ruan
     阮的声学特性
短句来源
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  acoustical performance
Prospective buyers of condominium apartments are in need of a check list to assist them in evaluating the acoustical performance of the units prior to purchase.
      
The fin perforation design can be varied dependent upon the acoustical performance needed in the space.
      
Reverberation time is the most fundamental concept for evaluating the acoustical performance of rooms and theatres.
      
Figure 4 Graphical comparison of the acoustical performance of perforated ceiling radiant cooling panels and acoustical ceiling tile.
      


This paper related to the experimental study and analysis as well as its thosretical basis on rectangular jets. The result showed that the slit complex hao just a little poor acoustical performance but better aerodynamic characteristics than the micropole complex, under experimental conditions, and that both the performance and charateristics were somewhat improved by changing its geometric shape. The application and efficiency of rectangular slit jets for noise control of air discharge valvi i f...

This paper related to the experimental study and analysis as well as its thosretical basis on rectangular jets. The result showed that the slit complex hao just a little poor acoustical performance but better aerodynamic characteristics than the micropole complex, under experimental conditions, and that both the performance and charateristics were somewhat improved by changing its geometric shape. The application and efficiency of rectangular slit jets for noise control of air discharge valvi i f metallurgical blast furmace were discussed, also functions and applicable prospects of the slits were illustrated.

本文叙述了矩形狭缝喷注的实验、结果和分析以及有关的理论基础。测试数据表明,在实验工况下,狭缝群的降噪能力比小孔群稍差,空气动力性能却比小孔群好,而改进缝的几何形状,其性能有所提高。介绍了矩形狭缝喷注在冶金高炉放风阀放风噪声控制上的应用和效果。

In this paper, a method of simulating the acoustics characteristics of auditorium using electroacoustic devices in two channel stereo sound production is given. By means of reverberation device and phase-shift circuit,diffusion feeling of reverberation sound field has been simulated. By adjusting the reverberation time and frequency response characteristics of reverberation signal,it is possible to simulate the acoustical performances of various playing auditorium and to meet the different demands in production....

In this paper, a method of simulating the acoustics characteristics of auditorium using electroacoustic devices in two channel stereo sound production is given. By means of reverberation device and phase-shift circuit,diffusion feeling of reverberation sound field has been simulated. By adjusting the reverberation time and frequency response characteristics of reverberation signal,it is possible to simulate the acoustical performances of various playing auditorium and to meet the different demands in production. This method is simple and can be used in home sound production. The fundamental principle, block diagrams and some experimental results are given.

本文提出一种运用电声器件在双通路立体声放声中模拟厅堂声学特性的方法。其中采用人工混响元件与相移电路等相结合,模拟了混响声场的漫射感觉。并且还可通过调节混响时间,混响信号的频响特性等,模拟出不同的演奏厅堂的声学特性,以适应不同的放声要求。此方法比较简单,可适用于家庭放音的要求。文中给出了实验的基本原理、方块图和一些实验结果。

In this paper,a coupked structural- acoustic finite element model of random responses ofnoises in a tractor cab is established. Random responses of the interior noises are computedaccording to this model.A good agreement is shown by comparing the predicted results withthe measured ones which are obtained by road simulation test on MTS road simulator,Fur-thermore,by means of the methods in this paper and reference l,interior noises in practicalworking condition of the tractor are computed and measured ,the results...

In this paper,a coupked structural- acoustic finite element model of random responses ofnoises in a tractor cab is established. Random responses of the interior noises are computedaccording to this model.A good agreement is shown by comparing the predicted results withthe measured ones which are obtained by road simulation test on MTS road simulator,Fur-thermore,by means of the methods in this paper and reference l,interior noises in practicalworking condition of the tractor are computed and measured ,the results are satisfactorythrough comparison. By the aid of the above method,acoustical performances of wheeledtractors can be analyzed and modified in their product design stage.It improves the past tra-ditional methods that acoustical performances of tractors were not able to be analyzed until aprototype tractor was made, The above theoretical analysis method makes it possible to real-ize the dynamic optimization acoustics design of the wheeled tractors.

建立了拖拉机驾驶室内部噪声随机响应的声固耦合模型,利用该模型计算了驾驶室内部噪声的随机响应,经MTS振台上的道路模拟试验表明,计算结果和试验结果吻合较好。把此模型和文献1中计算发动机振动引起的室内噪声模型结合在一起,对拖拉机在实际工况下的室内噪声进行了分析计算和试验,获得了较满意的结果。利用上述方法,在拖拉机产品设计阶段就能对其声学性能进行分析和修改,改变了以往要等样机制造出来之后才能对其声学性能进行分析的传统做法,使拖拉机驾驶室的动态择优声学设计成为可能。

 
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