Drones do not fly silently. If you’ve ever flown a drone, you may have noticed an insect-like buzz.. The noise isn’t an issue for outdoor use but can be a problem during indoor events or when children want to use an indoor toy drone while parents or siblings are busy. Wing construction has a lot to do with how much noise emanates from drones. Seventy decibels is a reasonably quiet noise level for a drone, and there are brands that offer drones that meet this standard.