1) parametric array
参量阵
1.
A device known as a parametric array employs the nonlinearity of the air to create an extre-mely directional audible sound from inaudible ultrasound.
超指向性扬声器是一种利用声波在空气中传播的非线性由不可听超声产生可听声的参量阵装置,这种声源相比相同大小的传统扬声器,可以产生非常强的指向性、像聚光灯光束一样的宽带可听声束。
2.
Audio directional loudspeaker is a novel loudspeaker which can generate an audio signal with high directivity by utilizing the parametric array principle.
声频定向扬声器是利用参量阵原理,产生高指向性声频信号的新一代扬声器。
3.
The nearfields of parametric array produced by circular focus beam,circular uniform beam and nondiffracting beam was calculated by using KZK equation.
文章采用KZK方程数值求解均匀平面阵、聚焦阵及非衍射阵形成的参量阵波束近场声场 ,比较了不同波束声轴上的原、差频声压级及声截面。
2) lattice parameter
点阵参量
1.
Calculating the lattice parameter of series TiO2 samples, and combining the grain - size and substructure pa-rameter, we found that there was lattice distortion at the nanocrystalline TiO2 powder.
对系列粉晶进行了X射线衍射点阵参量计算，结合所得到的晶粒度和微结构参数，发现纳米TiO2粉晶组元中存在着晶格畸变。
3) Parametric array
声参量阵
4) parametric sonar
参量阵声纳
5) parametric acoustic array
声学参量阵
1.
Based on the theory of parametric acoustic array,one 3×3 nine-element rectangular transducer array and a test system were designed.
根据声学参量阵原理,设计了一个3×3的九元矩形换能器阵及其测试系统,并在空气进行验证性实验;系统包括正弦信号产生电路、信号控制电路、功率放大电路以及回波信号接收电路等,辅以LabVIEW平台,实现正弦信号和脉冲控制信号的产生、发射信号时间长度控制以及功率放大,并最终驱动换能器阵;实验表明,当有85kHz和90kHz的正弦信号产生时,系统各部分均能正常工作,能够听到天花板处有声响,且回波信号中含有5kHz的频率成分,即证明换能器阵及其系统的设计均是可行的。
2.
Based on the operation principle of parametric acoustic array,a test system consists of hardware and software system is designed in this paper.
基于声学参量阵的工作原理,设计一个由软硬件组成的测试系统,其中硬件系统由换能器发射阵、超声波发射电路和回波接收电路等构成;软件系统以LabVIEW作为开发工具,通过利用数据采集卡,实现了输入信号的产生、波形显示、参数控制、数据采集存储等多种功能。
6) parametric array loudspeaker
参量阵扬声器
1.
Based on its high directivity, parametric array loudspeaker can be widely applied in many areas, and a good market prospect is expected.
参量阵扬声器是一种新型的强指向性扬声器,其原理是利用超声载波在空气介质中传播时的非线性效应生成音频信号。
2.
In the parametric array loudspeaker system, a number of piezoelectric ceramic ultrasonic transducers are used to make up of transducer emitter, and the number and location of transducer unit can change the directivity of the emitter.
在参量阵扬声器系统中,需采用若干个压电陶瓷超声换能器单元组成换能器发射阵,换能器单元的数目和排列位置会对发射阵的指向性产生影响。
补充资料：参量阵
见水声学、非线性声学。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条