Found the movie 'Sneakers' on Netflix last night, hadn't seen it in a long time, thought I'd give it a try.
It's a really good movie. If you've never seen it, I highly recommend it.
Stands to reason that in a gadget-filled movie with Dan Aykroyd, there'd have to be at least one piece of tech also seen in Ghostbusters, right?
(Wow, how did Dan Aykroyd get his name above Sidney Poitier's in the opening credits, anyway?)
Sure enough, about an hour and a half into the movie, Robert Redford lowers a sensor down from a crawlspace behind some thermal detectors...
And it's a Realistic Sound Level Meter with some minor dressing to the 'microphone' end and some clips for his wires on the bottom.
Alex