An acoustic imager, also known as a scientific camera, is a special device that uses a microphone array to measure the distribution of sound fields within a certain range. It uses acoustics, electronics and information processing technologies to superposition the audio image with the video image taken by the camera installed on the array in a transparent way, transforming the image visible to the adult eye, helping people to intuitively see the sound field, sound wave, sound source, and conveniently understand the location and cause of the problem caused by the machine equipment. ● Gas leak detection ● Partial discharge detection