Hidden compressed air leakage. You can see the hidden costs with acoustic camera! 

Hidden compressed air leakage. You can see the hidden costs with acoustic camera!
A clear detection of a hidden leakage of a compressed air system.
Detected with CRYSOUND CRY2623 acoustic camera.
Note: the cost of the compressed air need some correction, but it was a real and significant leakage point.
(C) Spectronics