[raphinou]

Having built a similar device, it appears that to give privacy to the person inside the bathroom, it is much better to have the music play outside. With music playing near to the "listener", the sounds coming from inside the room are much better covered.

Congrats for the realisation nevertheless!

[rendaw]

Psychologically though doesn't it feel more private to have the noise inside the bathroom?

[SamBam]

Until their outside the bathroom when someone else is in and realize it does nothing.