Sound exploration equipment and wind tunnel test equipment

摘要

PROBLEM TO BE SOLVED: To provide a search device for acoustic source to highly precisely search an acoustic source by reducing deterioration of a sound wave by influence of a free shear layer, and to provide a wind tunnel testing device.;SOLUTION: A wall part 7 is a member storing a microphone array 6 collecting sounds generated from the inside of a main stream F₁ and is arranged in the neighborhood of the main stream in the free shear layer F₂ formed in the circumference of the main stream F₁. The wall part 7 is preferably arranged at a position being in a range of 0.65-1.00 of a ratio of a speed of an air stream in the free shear layer F₂ to the speed of the main stream F₁ since the sound wave W of the sound from the main stream F₁ has a risk disturbed by the free shear layer F₂ when it is arranged at a position lower than 0.65 of a ratio of the speed of the air stream in the free shear layer F₂ to the speed of the main stream F₁. The wall part 7 is preferably arranged in the substantially same plane as the nozzle end face of the wind tunnel testing device 2 so as not to receive variation force due to the main stream F₁ as much as possible.;COPYRIGHT: (C)2008,JPO&INPIT