Mine is sorta constant, a bit like a high-pitched wheezy whistle but it …. pulses. Literally, I think. It’s a bit less than once per second, which is about right for my resting heartbeat. I’m convinced, though never had it medically confirmed, that the pulsing, a slight and very brief dip in frequency due to blood pressure dropping. I rationaise it, because itt’s what it sounds like, as dipping in frequency in the brief moment between heartbeats when the heart is at rest.
It has it’s advantages …. at least I know my heart is still going. 😉
It is also, as a friend would say, a right nucking fuisance.
I’ve always been pretty careful with listening volumes, though there was that Black Sabbath concert at Hammersmith Odeon about 40 years ago. Not that it was loud, but I nearly got flattened by a double-decker bus when I came out, ’cos I didn’t hear the dratted thing coming.
Most listening these days is either on Sennheiser Momentum cordless headphones, or my trusty old Stax Electrostatics. Oh, and Cambridge Audio earbuds, from the phone. Mostly, I listen to digitised versions of my LPs and CDs, stored locally, on a NAS in the house. But I like a really clear sound, not loud sound. Frankly, too much of the time I have a headache to want head-banging. And sadly, my rock concert days are long over.