I built a very simple circuit so I could use my Bose headphones in the noisy server room without wasting batteries. I however feel silly that I did not know how noisy USB power was, thus the V(L) power is to noisy for the headphones to function properly.
I'm pretty sure I just need an inductor on the input right? Is that all? If that is indeed all I need I was wondering if someone could provide me with a proper design example with the idea of approaching input noise in general as it was something I never really learned how to tackle.