The link below is a video from students at Washington Middle School in Olympia explaining how they use field mic's or cell phones to capture audio for UAV videos and then edit to synchronize the two sources and use Audacity to further reduce the background noise of the UAV propellers.
https://drive.google.com/open?id=1A2xXCJu5miTWvvX8RUvzIgH3w5iwpjMX
