mine doesn't buzz at all -- i have not noticed it whatsoever since i got it.
on the other hand, the LEDs are quite bright and annoying to me. furthermore, it is not one little LED that one may consider putting black electrical tape over, but, it is a "ring" of LED, circular, just like the shape of the charging pad itself.
this is really annoying to me, especially since there's no user setting to allow for bedside use versus desktop use. stupid design, not thoughtful at all.