METHOD AND DEVICE FOR ESTIMATING THE ACOUSTIC PRESSURE IN A MOVING FLUID AND COMPUTER PROGRAM

摘要

The invention relates to a method for estimating the acoustic pressure of a fluid generated by sound waves, including the following steps: seeding (40) the fluid with particles; measuring (42) at least one reference signal correlated with sound waves; for every direction of a reference mark: emitting (44) light beams by means of a source and receiving the diffused light beams, measuring (44) a speed signal of the particles in a predefined volume using laser Doppler velocimetry having fringes, calculating (58) the correlation between the measured speed signal and the measured reference signal, estimating (60) spatial components of the speed of the fluid generated by means of the sound waves; and calculating (64) the acoustic pressure in a macroscopic volume (36) using three-dimensional Euler equations and spatial components of the speed.