I listened to both clips just over the speaker on my phone and did not hear any background noise. Maybe someone else here might.
I will check with headphones later. I am sure other folks will give their input too.
As far as mics - I belive the appeal of the Purple Pandas for our style of videos is not because the quality. It is the lack of sensitivity. Yesterday
@scooterwuf was interviewing
@Kuribe out in the wild. The Purple Panda had too low of input on his Tascam even with adjustments so I whipped out my Sony ECM and all was good. However the Sony ECM is too good for the Hero 4 Silver, Hero 5 Session, and Hero 8 Black - the cameras all end up clipping.