Thanks for the pointer, I'll be looking it up shortly. Anecdotaly, I've found myself getting a phantom tone in the 15khz range (sounds just like a flyback) whe

Thanks for the pointer, I'll be looking it up shortly. Anecdotaly, I've found myself getting a phantom tone in the 15khz range (sounds just like a flyback) when in a quiet house. This could be entitely placebo effect, but I've gotten some relief by doing a bad emulation of active noise cancelling headphones, namely playing a quiet 15khz (ish) tone through my bone conduction headphones. It's not perfect by any means, but often the very act of trying to tune my tone generator to the right frequency can be enough to stop it annoying me (it becomes less noticeable). Im curious if anyone else has tried similar?