The sound appears to be from the headphone out from my phone. I tried many apps, it seems to have the same results. Also I did not hear it on the internal build in speaker. I also tried different speakers and headphones, the popping sound is still there.
I have a friend who had the same phone, but his does not seem to have a popping sound. Could my phone be faulty? I just purchased it about 2 weeks ago.. And I did not drop it so I don't think it will break
Sounds like you could have a defective phone. Contact whoever you bought it from for an exchange if possible, or contact the manufacturer or carrier for a replacement
dpham00, Android Central Moderator
Sent from my Verizon Samsung Galaxy Note 3