Design
of new acoustic sensors, wind protectors and anti vibration
mounts more suitable for drones, research on self-engine noise
cancellation both at the mechanical and computational levels,
exploiting other acoustic cues such as intensity or Doppler shift
of frequency, integration of the audio based system with other
technologies such as vision or radio waves, and combining
the bearing measurements with predictions estimated from the
motion model of wirelessly-connected drones using a nonlinear
filtering framework, are some future work aiming at improving
relative positioning