Acoustic holography system for the bottom of a body considered the influence of reflected wave

摘要

PURPOSE: A lower body acoustic holographic apparatus considering a reflected wave influence is provided to remove reflective waves and detect a noise source by obtaining two hologram planes. CONSTITUTION: A platform has a hollow inner part and an upper surface center part which is cut and open, so that an object to be measured is put on the upper surface center part and the platform support the object to be measured. A two-row microphone array(20) is slidably installed at a space part in a width direction for obtaining two hologram planes. A control unit(30) controls the two-row microphone array for obtaining a wanted position and the detected holography. The position of the two-row microphone array is accurately controlled by a pair of ball screws(14).