Flying cars make loud noises

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Describe the Bug

Not sure it's actually a bug, but seems odd.

1. Open highway_overtake.wbt and unmute
2. Apply a force to the car big enough it will fly off
3. Play.
4. Console shows: wb_speaker_play_sound() called with a volume value greater than 1: 1.75972. Setting volume to 1.

I suspect that since the car flies off, the motors are getting ludicrous commands. However I still don't see why even in this scenario the volume would ever need to be above 1.