When a pressurized gas leaks or a vacuum leaks, the flow of the gas will form a turbulence. The turbulence emits acoustic energy, which will cover the audible and ultrasonic frequency bands.In the general environment, noisy ambient noise is very easy to mask the sound signal in the audible domain.Therefore, by detecting possible ultrasonic frequency sources in the environment, the CRY 2612 imager can quickly locate the location of gas leakage.