Originally Posted by
FliesWay2Much
It would be nearly impossible to do an audio recording of a TSA checkpoint and pick out individual conversations over the ambient noise level.
No, the technology is available. I work for a security equipment manufacturer and it is entirely possible to have audio on each lane of a checkpoint that isolates individual conversations.
As to whether the TSA uses them, I don't know. You'd have a difficult time with the privacy argument since there is little or no expectation of privacy at the checkpoint.