A shear layer phase shift correction method for three-dimensional finite thickness wind tunnel based on simplified ray model was presented. And its physical basis was explained with the help of numerical simulation. A comparison of the simplified ray model with Amiets method and average Mach number method was given. The presented simplified shear layer correction method was validated experimentally using a microphone array to localize an inflow source. Lastly

the curved shear layer phase shift correction method using the simplified ray method was given. It was found that if inflow Mach number was less than and equal to 0.3 and measurement angle ranged from 40° to 140°

when the source and mircophones were on the same plane

the difference between the three correction methods was less than 1%.