超声调制的声频定向传输指向性分析  

Directivity Analysis of Ultrasound- modulated Audio Directional Transmission

作　　者：汤惠[1] 黄虎[1] 

机构地区：[1]成都理工大学信息科学与技术学院,四川成都610059

出　　处：《电声技术》2015年第11期42-48,共7页Audio Engineering

摘　　要：通过详细的理论推导与计算,分析了影响超声调制的声频定向传输指向性的相关参数,得到了声频定向传输指向性与超声波换能器阵列排列形式、换能器阵列中各个振元的间距、振元个数以及载波频率等有关。在设计声频定向传输系统时需要结合实际要求,综合考虑定向传输的指向性和传输效率选择载波频率和设计超声波换能器阵列。In this paper, the parameters related to the directivity of ultrasound -modulated audio directional transmission are analyzed by a detailed theoretical derivation and calculation. Through the analysis and calculation, it is found that the di- rectivity of directional audio sound can be influenced greatly by the change of the form of the array, the spacing between two transducers, the number of transducers as well as the carrier frequency. So in the design of audio directional transmission system, the impact of these parameters need to be taken into consideration.

关 键 词：声散射理论 声频定向 指向性 超声换能器阵列 

分 类 号：TP912[自动化与计算机技术]