Weird motor sounds at full throttle.

[Pedro.FR2K]

I have no idea how to explain this but I'll try to explain it as simple as possible.
It was a very hot day, I was recording a car going about 62kmh, so I had to use sport mode at full throttle.
It was far away (about 120m) so I couldn't hear it. When it got closer to me I began to hear some weird noises coming from the motors, I swear, those noises really sound like a long continuous fart. It only happens when I'm at full throttle, I don't notice any stability issues, control loss or anything else, flies just fine, only the noise is concerning me.
I've tried switching props to a brand new set I got recently, didn't hear that noise anymore, but now it's back again.
Does anyone have an idea why it happens? I don't want my Mavic to suffer from intestine gas.

 

[dirkclod]

I've never heard such but maybe @Thunderdrones could give us some idea on this.
Farts huh...did they smell

 

[HVYMTL]

Has the drone been crashed? Are the rear arms over extending and hitting the main body?

 

[Former Member]

OP, a video shot by a second person would help.

 

[Pedro.FR2K]

Has the drone been crashed? Are the rear arms over extending and hitting the main body?

No crashes. Has a total of 55Km on the clock though

 

[Pedro.FR2K]

OP, a video shot by a second person would help.

I can’t get a shot atm. When I have some time available, I’ll attach a mic under the drone with a windscreen and see if I can record the sound.