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Originally posted by watchtheashes
reply to post by bl4ke360
I think I know what you're talking about my friend. I've heard such things too. It's almost digital sound right? Although I live by a few Air Force Bases so it could be that too.
and if you read my post you would have read that I confirmed the noise came from outside.
Originally posted by shamus78
What about any security systems or telecommunication systems outside (probably fixed to the wall)?
Many digital systems make 'digital beeps' when working normally. It could be something is on a timer. Something like a security system communicating with a security centre. Nothing sinister - just doing whats it's make for. Even when not being used (depending on the system), a system will frequently 'call home'. Have a look outside and see whats around.
Picture please of the outside area if possible. It would make it much easier.