I realised I can hear the hum when I am. Sitting and it disappears when I am lying down. 

Any idea how this will playout with Bluetooth earbuds, if that hum would add onto and create some interference. 


(I would suggest the right, volume or decibel at which this is ideal, that would help! I felt relaxed, I was at full volume to start with, but once I read some comments I decreased it, 

I am sensitive to sounds, I get uncomfortable with microwave sound etc..) 

Yeah; read the details 👍
Yeah, earbuds are horrible for trying to lie down and listen. They just fall out.
If you're looking for headphones that won't fall out, or get in the way while you're trying to sleep (especially on your side), check out these flat headband headphones (CozyPhones): https://amzn.to/2TcdGaK (affiliate link, commissions earned)
Sam Verekar