ACOUSTIC SENSEING DEVICE AND ACOUSTIC CAMERA USING MEMS MICROPHONE ARRAY

摘要

PURPOSE: An acoustic sensing device and an acoustic camera using a MEMS(micro electro mechanical system) microphone array is provided to improve reflected wave rejection performance by blocking front and rear sound using a PCB(printed circuit board). CONSTITUTION: A plurality of MEMS microphones(10) are mounted on a PCB(20). The MEMS microphone has two to ten wing units which are expanded to a radial direction. An acoustic sensing device(30) transmits a signal of the sensed sound to a data collecting unit. The data collecting unit is connected to the acoustic sensing device. The data collecting unit transmits a digital signal of the sound to a central processing unit by sampling an analog signal of the sound which is transmitted from the acoustic sensing device. The central processing unit calculates a sound level based on the digital signal of the sound which is transmitted from the data collecting unit. A display unit displays a sound level, which is calculated in the central processing unit, in colors.