Technology & Engineering
High Quality Drone Audio Capture
The considerable growth in the sales of small drones is driven, amongst other things, by applications that use drones to record videos from new and desirable viewpoints. However, because of the strong ego-noise generated by the rotating motors and propellers, even the most advanced system can only record poor quality sound. This also affects other use cases when audio might be captured onboard drones e.g. spoken instructions in a human‑drone interaction or direction finding a whistle blast during a search and rescue operation.
Researchers at Queen Mary, University of London have developed a technology that can reduce the ego-noise with a novel microphone-array signal processing technique. The prototype works independently of the drone type and size and does not require dedicated microphones for monitoring motor sounds to be installed.