Thanks advbike. Yes, I relate to the loud music and also the caffeine.. I love my rock and reggae music and when I was drinking wold pop on the earphones and turn the volume RIGHT up. It's not noticeable when I'm walking around or generally doing something - seems more noticeable when I'm sitting typing on here or watching TV etc. Like you said, I can tune it out.
Yeah, the bath thing, was me thinking it might be ear-wax, but didn't make a jot of difference
Will definitely take on board your suggestion of earplugs - thanks
Xx
PS Mine's a high pitched kinda whistling too - sounds like you might have solved it for me X