摘要
利用超声波在空气中传播的非线性交互作用,可以产生高指向性的可听声音。构建了基于超声调制的模拟声频信号定向传播系统,设计了超声换能器阵列及其实验测试装置。利用该系统对不同频率声频信号在传输过程中的变化特征及其指向性进行了实验研究和对比分析。
By the nonlinearity of the propagation medium-air, the audible sound with high directivity can be produced. The directed audio analogue system based on ultrasonic modulation is constructed, and the ultrasonic transducer array and the experiment equipment are designed. In this system, the different characteristic and directivity of the different frequencies audio signals while propagating in the air are tested and analyzed.
出处
《电声技术》
2009年第4期74-76,80,共4页
Audio Engineering
关键词
声频定向
调制信号频率
指向性
directed audio
modulation signal frequency
directivity
