PRESSURE WAVE GENERATOR

摘要

PROBLEM TO BE SOLVED: To suppress the generation of shock wave to obtain a pressure wave having a larger amplitude than the conventional one in a pressure wave generator constituted by connecting an acoustic driving device 3 for radiating an acoustic wave into the tube to the end of an sound tube 1. SOLUTION: In this pressure wave generator, plural Helmholtz resonators 2 having an flow passage communicating with the inside of the sound tube 1 are arranged in a tube wall of the sound tube 1 at regular intervals in the tube axial direction of the sound tube 1. Each Helmholtz resonator 2 is composed of a throat part 21 having a narrower passage than the sound tube 1 and whose base end part is connected to the tube wall of the sound tube 1; and a cavity part 22 having constant volume and connected to the tip part of the throat part 21 for enlarging the passage of the throat part 21.