But now I've got a 15 year old border collie who hates those things
Dogs can get this way around fireworks, thunderstorms, etc, by people thinking they're comforting the dog when it looks worried. Instead, the dog takes this as confirmation there's something to be worried about and it becomes an increasing cycle. The secret is to pay no attention to the dog's worrying behavior instead of petting and telling it everything is OK.
This may not be your case; I'm just using you as a seque to bring it up.