For a water leak a sound imaging device is not going to help you.
You should definitely try a thermal camera. Any moisture will create small temperature differences which are easily picked up by a thermal camera.
Flir has some thermal cameras with 'special moisture' modes. In the end, wet areas are just colder.
Moisture camera. Now there is an idea.
Flir has some thermal cameras with 'special moisture' modes. In the end, wet areas are just colder.