Unmanned aerial vehicle (UAV) for collecting audio data

A method of collecting audio data using an unmanned aerial vehicle (UAV), comprising:

• detecting a target audio signal using an audio source collecting microphone;
• collecting audio data using each of a plurality of background microphones on the UAV to collect a background noise from a corresponding one of a plurality of background noise-producing components, the background noise being different from a target audio signal, and the plurality of background microphones being in one-to-one correspondence with the plurality of background microphones, and each of the plurality of background microphones being:
• positioned between a corresponding one of the plurality of background noise-producing components and the audio source collecting microphone;
• positioned on a line that connects the corresponding one of the plurality of background noise-producing components and the audio collecting microphone;
• emitting an audio signal to actively reduce the background noise using each of a plurality of noise emitters on the UAV and disposed within a proximity sufficiently close to a corresponding one of the plurality of background noise-producing components to reduce the background noise of each of the background noise-producing components, the plurality of noise emitters being in one-to-one correspondence with the plurality of background noise-producing components and the plurality of background microphones, and the audio signal emitted by each noise emitter having a reverse phase of the audio data collected by a corresponding one of the plurality of background microphones that corresponds to the corresponding one of the plurality of background noise-producing components;
• and
• processing, using a Multi-Channel Recursive Least Square adaptive filter, the target audio signal collected by the audio source collecting microphone to generate a processed target audio signal having reduced background noise.

An unmanned aerial vehicle (UAV) with audio filtering components, comprising:

• a central body;
• a plurality of arms extending radially from the central body;
• an audio source collecting microphone located at the central body and configured to detect a target audio signal;
• a plurality of background noise-producing components each configured to produce a background noise, one of the plurality of background noise-producing components located at a distal end of one of the plurality of arms;
• a plurality of background microphones being in one-to-one correspondence with the plurality of background noise-producing components, one of the plurality of background microphones being:
• positioned between the distal end of the one of the plurality of arms and the audio source collecting microphone to collect audio data including the background noise;
• positioned on a line that connects the distal end of the one of the plurality of arms and the audio collecting microphone;
• and
• a plurality of noise emitter being in one-to-one correspondence with the plurality of background noise-producing components and the plurality of background microphones, one of the plurality of emitters being:
• disposed at the distal end of the one of the plurality of arms;
• and
• configured to emit an audio signal having a reverse phase of the audio data collected by the one of the plurality of background microphones, to actively reduce the background noise;
• and
• a processor configured to, using a Multi-Channel Recursive Least Square adaptive filter, process the target audio signal collected by the audio source collecting microphone to generate a processed target audio signal having reduced background noise.