Ultrasonic Directivity Study Based on Sensor Arrays

Inhalt:
Directional sound source is a new type of sound propagation method that uses the nonlinear effect of sound waves propagating in the air to produce highly directional audible sound, compared with the old diffusion type loudspeaker, not only can directionally spread the sound, and the sound beam is concentrated to spread farther, because of good reflectivity, can also be used to produce special sound effects such as virtual sound source, surround sound field. In the field of public security, armed police, maritime surveillance and fishery administration, military, airport to drive birds, civil disaster relief departments, border control and other fields have a wide range of application prospects. This paper analyzes the theoretical basis of the directional sound source, introduces the relevant background and origin of the acoustic parametric array, solves the Berktay far-field solution, the Westervelt acoustic parametric array, and the KZK equation, analyzes the ultrasonic properties, points out that the key to the directional sound source is the nonlinear characteristics of the medium, and builds the ultrasonic sensor calculation array by MATLAB, and studies the different factors on the ultrasonic wave directivity.