基于D类功放的定向声频系统设计  

Design of Directional Audio System Based on Class D Power Amplifier

作　　者：张显才[1] 高敬祥[1] 王蕾 Zhang Xiancai;Gao Jingxiang;Wang Lei(Air Force Early Warning Academy,Wuhan Hubei 430019,China)

机构地区：[1]空军预警学院,湖北武汉430019

出　　处：《山西电子技术》2024年第3期21-23,47,共4页Shanxi Electronic Technology

摘　　要：为解决传统声音传播发散性和无指向性所带来的噪声扰民问题,设计实现了一种以超声波为载体,依据其具有波束窄、指向性强的特点和空气非线性实现的自解调原理,以D类功率放大器为核心的定向声频系统。经过实际使用,该系统工作稳定,定向性好,可以较好的解决噪声扰民问题。In order to solve the problem of noise disturbance caused by the divergence and non directionality of traditional sound propagation,based on its narrow beam and strong directionality characteristics and the self demodulation principle of air nonlinearity,a directional audio frequency system with class D power amplifier as the core is designed and implemented using ultrasound as the carrier.After practical application,the system works stably and has good directionality,which can effectively solve the problem of noise disturbance to residents.

关 键 词：超声波 定向声频 D类功放 

分 类 号：TN964.3[电子电信—信号与信息处理]