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- reference acoustical power 标准声功率
- Also two important energy forms of thermoacoustic system: acoustic power and total power are discussed in details. 在此基础上，阐述了热声系统中两种重要的能量形式：声功和总能流，得到了它们的可用公式。
- In this paper,a method for measuring acoustic power of plane piston transducer based on calorimetry is presented. 介绍了一种基于量热法的平面换能器声功率测量的方法。
- Don't refer to this matter again, please. 请不要再提这件事了。
- A maximum acoustic power 43.1 W output to RC load of 110 cm~3 capacitance was measured with helium filling of 2.1 MPa and heating power of 2 000 W. 以氦气为工质;在充气压力2.;1 MPa、加热功率2 000 W的条件下;采用110 cm3的气库;在1台驻波型热声发动机上获得了最大43
- The king was shorn of his power by his nobles. 国王被手下的贵族们剥夺了权力。
- A thermoacoustic engine converts thermal energy into acoustic power by thermoacoustic effect without any mechanical moving parts. 热声发动机利用热声效应把热能转化为声功,系统中不存在任何机械运动部件。
- Acoustic power and ultrasonic frequency are both important factors of the degradation of paper mill wastewater ultrasound. 声功率及声频率对造纸黑液的超声降解均有影响。 (5) 超声时向溶液中通入不同溶解气体均能提高超声辐射的效果。
- However, the highest transfer efficiency and largest acoustic power cannot be obtained simultaneously, therefore a trade-off condition must be adopted. 然而系统效率与输出声功率不能同时达到最大值,因此在实际应用中只能采取折中的效果。
- There are three calculation methods of the acoustic power radiated by an electrical machine, which were presented by Jordan, Alger and Yang. 电机电磁噪声的辐射声功率的计算目前广泛采用Alger、Jordan、Yang等人分别提出的三种方法。
- A microphone is a device for converting acoustic power into electric power that has essentially similar wave characteristics. 麦克风是一种装置，其声功率转换成电力，它基本上类似波的特点。
- In this article, a method to optimize not only the directivity but also the acoustic power of loudspeaker arrays is developed. 摘要提出了同时优化扬声器阵列的指向性和声功率级的方法。
- In consideration of the directivity and acoustic power, the input voltage distribution of a loudspeaker array can be optimized and selected. 运用该方法可以优化扬声器阵列的输入电压分布，获得指向性和声功率级二者兼顾的扬声器阵列。
- The acoustic pressure and acoustic power of the whole structure are obtained by superposing those of each infinitesimal element. 以每个微元为一单位，分别计算声压和声功率之后叠加起来，即得整个结构的声辐射。
- This reference book is very useful to our study. 这本参考书对我们的研究很有用。
- Is this reference book of any use to me? 这本参考书对我有用处吗？
- I like to have my reference book within my reach. 我喜欢把参考书放在随手拿得到的地方。
- Tony used no reference books in class. 托尼上课时不使用参考书。
- Objective To investigate the influences of transducer frequency and acoustic power (AP) on the measurements of the magnitude of cyclic variation of integrated backscatter (CVIB). 目的 观察超声背向散射积分心动周期变化幅度 (CVIB)测值与探头频率及发射声波能量 (AP)的关系。
- Evidently shipowner to bear expense refer. 很明显船主应承担此费用。
