Most of the existing equipment airtightness testing programs are based on pressure-holding, water immersion and soap water, they are extremely inefficient.Acoustic imaging gas tightness test method, using the ultrasonic microphone and acoustic imager combination, the ultrasonic microphone is placed in the object to be tested. If there is a leak, its internal ultrasonic source emitted through the leak hole to the outside and thus accurately captured by the acoustic imager.This method is very efficient and does not cause damage to the object to be measured.