romex touching both leaves of 'room within a room'?

Hi all. The electrician has wired things such that the romex is touching both the inner and outer leaves of my 'room within a room' prac room/studio. There isn't any conduit involved so it's just the romex traveling along the outer room which then traverses the gap to the inner room where the outlets will be (which will be surface mounted to avoid large penetrations in this layer). There's plenty of slack in the wire and my preliminary tests (banging on one wall and putting my ear to the other) aren't turning up anything that seems alarming volume-wise. But since I've spent so much time making sure that the inner room is as isolated as possible I thought I'd ask here. The gap between leaves is 6" (and that's bottom plate to bottom plate so the actual distance between drywall leaves is greater than that) and that gap will be stuffed full of pink insulation. I'll also be doing 3 layers of 5/8" on that inner room. Thoughts? Concerns? I searched on this issue and only found one mention on the AVS forum. Here: http://www.avsforum.com/avs-vb/showthread.php?t=1255363 Thanks.

As long as the wiring is properly installed - which means that the cable has plenty of slack - then there should never be an issue with this. Basically what you have here is a guitar string - when taunt it will have a resonant frequency - and at that frequency (and harmonics of that frequency) it will resonate - which can cause problems of it's own. It can also transmit frequencies other than it's resonant frequency - the same way that a string connected tightly to 2 tin cans can be used to communicate between two relatively large distances. However - if you take the guitar string alone - or the string connecting the 2 cans is loose - then nothing is going to be transmitted from one end to the other (with the single caveat being the transmission of the electrical energy due to the charged electrons in the cable - however this is not the question being asked in this post). Rod