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loudspeaker
相关语句
  扬声器
     Real ear unaided response were obtained from 30 normal ears at 0°,±15°、±30°、±60°and±90° loudspeaker azimuths(θ) with probe tube microphone system.
     在扩散声场中,应用探管传声器系统测量了15人30耳在扬声器分别取0°(参考点)、±15°、±30°、±60°和±90°各方位角(θ)时的真耳非助听响应。
短句来源
     Study and Design for Parametric Loudspeaker System Based on DSP
     基于DSP的参量扬声器系统研究与设计
短句来源
     Design of 8 th Order High Pass Loudspeaker System and Computer Emulation using SPICE
     8阶高通扬声器系统的设计与SPICE计算机仿真
短句来源
     STUDY ON IMPROVEMENT OF LOUDSPEAKER PROPERTIES WITH DLC FILMS
     DLC膜改善扬声器性能的研究
短句来源
     Approach to CAT Technique of Comprehensive Parameters of Loudspeaker
     扬声器综合参数CAT技术探讨
短句来源
更多       
  扬声器
     Real ear unaided response were obtained from 30 normal ears at 0°,±15°、±30°、±60°and±90° loudspeaker azimuths(θ) with probe tube microphone system.
     在扩散声场中,应用探管传声器系统测量了15人30耳在扬声器分别取0°(参考点)、±15°、±30°、±60°和±90°各方位角(θ)时的真耳非助听响应。
短句来源
     Study and Design for Parametric Loudspeaker System Based on DSP
     基于DSP的参量扬声器系统研究与设计
短句来源
     Design of 8 th Order High Pass Loudspeaker System and Computer Emulation using SPICE
     8阶高通扬声器系统的设计与SPICE计算机仿真
短句来源
     STUDY ON IMPROVEMENT OF LOUDSPEAKER PROPERTIES WITH DLC FILMS
     DLC膜改善扬声器性能的研究
短句来源
     Approach to CAT Technique of Comprehensive Parameters of Loudspeaker
     扬声器综合参数CAT技术探讨
短句来源
更多       
  “loudspeaker”译为未确定词的双语例句
     THE CONSUMER MOST LIKES RESPECTABLE LOUDSPEAKER——JVC CS-WDS1
     最受青睐之尊贵者——JVC CS-WDS1
短句来源
     THE CONSUMER MOST LIKES SOUNDS OF PEOPLE LOUDSPEAKER——FOCAL 165V2S
     最受青睐之人声者——FOCAL 165V2S
短句来源
     THE CONSUMER MOST LIKES RETURN TO ORIGINAL STATE REAL LOUDSPEAKER——DLS RS6
     最受青睐之声音忠实者——DLS RS6
短句来源
     A limitation upon low-frequency loudspeaker performance is derived in the form of a frequncy-weignted integral of efficiency.
     文章以效率的频率加权积分形式导出低频扬声器性能的限值。
短句来源
     The electrophonic loudspeaker's vibration model is established with the aid of instantanoous measurement and statistical analysis with dynamic analyser SD375. The available slatistical relation is obtained by use of regression analysis to carry out the frequency modification of electrophonic loundspeeaker.
     借助于动态分析仪SD375,用瞬态测试的锤击法和统计回归分析法,建立汽车电声喇叭的振动模型,并给出实用的统计关系式,使喇叭的工作频率得到修正。
短句来源
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  loudspeaker
To provide the necessary excitation power, a variable control amplitude/frequency audio oscillator was used to drive a loudspeaker which was mounted underneath the models.
      
The device providing tactile stimulation is based on a loudspeaker circuit and provides blows of dosed energy.
      
On a loudspeaker membrane, FCS-1 triggered in males from a Slovene and a French population significantly more courtship songs (MCrS) than FCS-2.
      
In order to simulate a calling male moving closer to a male in an aggregation, a playback technique was adopted whereby the recorded calling song of a male was presented to itself via a loudspeaker in increments of 2dB.
      
The tested specimens were injection moulded loudspeaker grills.
      
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This paper describes the design of a frequency shifter to suppress acoustic feedback, to be studied by the experimental method. When the frequency shifter is inserted between the microphone and loudspeaker in the public address system, it shifts all frequency components of the microphone signal by a constant amount. By this method two types of distortions due to acoustic feedback in the public address system can be reduced. The sound pressure level in a room can be increased by about 5-8 db on a number...

This paper describes the design of a frequency shifter to suppress acoustic feedback, to be studied by the experimental method. When the frequency shifter is inserted between the microphone and loudspeaker in the public address system, it shifts all frequency components of the microphone signal by a constant amount. By this method two types of distortions due to acoustic feedback in the public address system can be reduced. The sound pressure level in a room can be increased by about 5-8 db on a number of auditoriums. For the public address system in free field, which has multiple loudspeakers, it also has the same effect. If the public address system is operated below but too close to the instability condition the frequency shifter can reduce effectively the interference of the regenerative reverberation.

本文叙述抑制声反馈的频移器的设计,并进行了实验研究.当语言扩声系统的传声器和扬声器之间插入频移器时,传声器信号的所有频率分量都偏移一个常量,这种方法可以减少语言扩声系统在有声反馈时产生的两类畸变.对于一般厅堂,扩声声级大约可提高5—8分贝.对于具有分布式扬声器的窒外扩声系统,也有类似的效应.若语言扩声系统临近不稳定状态工作,频移器可以有效地减少再生混响干扰.

On the basis of several years of experiences in the measurement of R.T. in auditoria (with empty and full audience), and of the accumulated data experimenting with different sound sources, in this article the deviations of measurement results are examined and analysed. The coefficients of variation of measured R.T. due to recorded reading's deviation are within about 5% under carefully controlled conditions; while the coefficients of variation due to non-uniformity of sound field in normal halls come within...

On the basis of several years of experiences in the measurement of R.T. in auditoria (with empty and full audience), and of the accumulated data experimenting with different sound sources, in this article the deviations of measurement results are examined and analysed. The coefficients of variation of measured R.T. due to recorded reading's deviation are within about 5% under carefully controlled conditions; while the coefficients of variation due to non-uniformity of sound field in normal halls come within 10% approximately. With regard to the deviations among measured results from different sound sources, they are always below the deviation scope mentioned above. Therefore no significant difference can be observed. The sources of sound, both in a steady state and in an impulse state, used for comparison, include an orchestra playing staccato chords, a white noise and a warble tone from a loudspeaker, a blast from a sport pistol and a burst of a children's toy balloon.Occasionally large deviations are observed in the R.T. measurements in the same hall by different authors, there fore a normalized method for R.T. measurement should be considered.In order to find the reverberation time in the full occupied condition, cotton padded garments are used to simulate the acoustic absorption of real audience and the results are quite satisfactory.

本文根据多年来在一些大厅中进行混响时间测量(空场和满场)的经验,以及利用不同声源所积累的资料,分析了测量的误差.由于记录读数误差导致的混响时间的变异系数可控制在5%左右,而由于厅内声场不均匀性所引起的变异系数则在10%左右.至于利用不同声源所得结果之间的偏差则往往小于上述的误差范围,因此它们的差异并不显著.比较时所用声源有乐队、白噪声、啭音、发令枪声和气球的爆破声.本文还指出,在某些厅堂中测得的混响时间重复率较低,类似情况或更严重者(相差达50—100%)在文献中亦有报导,值得注意.因此,制订规范化的测量方法也就非常必要.为模拟厅堂满场条件的声学特性,曾利用棉衣代替观众进行了混响时间的比较性测量,结果基本上一致.

Modulation of air stream is an efficient method of sound production. Man's speech organs, sirens, electro-pneumatic loudspeakers as well as common whistles are all based on this principle. The features of air stream sound sources are their high efficiency and possibility of high power outputs, which afford them practical value. The sound production by modulating air streams were discussed by previous authors and theories-given, but some were oversimplified and others too involved to allow practical computations....

Modulation of air stream is an efficient method of sound production. Man's speech organs, sirens, electro-pneumatic loudspeakers as well as common whistles are all based on this principle. The features of air stream sound sources are their high efficiency and possibility of high power outputs, which afford them practical value. The sound production by modulating air streams were discussed by previous authors and theories-given, but some were oversimplified and others too involved to allow practical computations. In this paper, air flow vs pressure characteristics of air stream sources are derived from the basic theory of gasdynamics and graphical method is presented for the estimation of sound radiation under given conditions of plenum pressure and nozzle-to-horn throat area ratio. It is established that although the air flow characteristics as well as the radiation relations are nonlinear, the radiated sound power is determined mainly by the radiation of the fundamental, and approximations give rise to simple expressions for the radiated sound power, the air stream yield and efficiency, with an error less than 1 dB from exact results. Charts are given to facilitate design and question of optimum condition is discussed.

利用气流调制以产生声音是一个比较有效的方法。人的发声器官、旋笛、电动气流扬声器以及一般哨子等都是根据这个原理。气流声源的特点是效率高,功率可以很大,有实用价值。关于气流声源的发声原理,过去已有一些讨论,但有的是过分简化,有的比较细致,但又过于繁复,不便计算。本文从气体动力学的基本原理出发,求得气流声源的气流-压力特性,并用图解法求得在给定气室压力和气流喷口面积比的条件下声辐射特性的方法,考虑到气流声源的气流特性和辐射关系都是非线性的,但是辐射声功率主要由基频决定,从而用近似理论求得了声功率、气流产额和气流效率的简单表达式,和严格理论的结果相比,误差不到1分贝。文中把结果画成图表以便计算,并讨论了最佳设计的问题。

 
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