“The Ear-Buddy is a nifty device which you can plug your headphones in and its aim is to remove background noise and to make it possible to recover the ‘lost bits’ when using digital volume adjustment. I found the Ear-Buddy to be extremely useful….it deserves every praise and my full recommendation.”
https://www.soundphilereview.com/reviews/ifi-ear-buddy-review-1501/
Many thanks Soundphile Review for your awesome review