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Noise under dron

Joined
Jan 9, 2018
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Age
27
After an accident when landing the drone falls a little less than 1 meter, everything seems normal, then I notice that at the bottom where the sonic sensors are emits a noise like a nose if it is normal and I had not noticed or is it some error due to the fall, how are those sensors calibrated? , I would greatly appreciate your help
 
There is a cooling fan inside the Mavic
 
Its like a clicking
Faint clicking seems to be normal.

It's ultrasonic pulses from the transducers. Seems like they also output frequencies detected by human ear.

I've never noticed mine but often wonder wether it's differences in the transmitter or that I just can't hear the frequency that some people can.
 
Lycus Tech Mavic Air 3 Case

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