【摘要】 声频定向系统利用了超声波在空气中传播的非线性交互作用和自解调效应直接在空气中产生具有高指向性的可听声音。介绍了声频定向扬声系统的原理和系统组成,重点分析了基于PVDF膜设计超声波换能器的要求和设计方法及一款超声波换能器。更多还原

【Abstract】 Directional sound(or audio beam) is a revolutionary way of producing directional sound to listeners,which creates virtual sound sources by using the nonlinear interaction and self-demodulation of ultrasonic in air.The principle and contents of a directional sound system are introduced,and the requirements and method of designing an ultrasonic transducer for directional sound are discussed.更多还原