I have been wondering about these for awhile now... this is my first drone and understood they were on the "loud" spectrum. And flying at 200 feet or more still
noisy. The "tests" on Youtube showed that the decibel readings were about the same
on a sound meter. But the pitch was different.. resulting in a "sound" less noticeable .
The Captain Drone guy had a video and he is exclaiming "They are quiet !..."
Well I sort of trust a sound meter over a guys "ear."
But.. well... they are on Amazon (US) for about $29 (4pcs ie complete set), and I really like the orange for visibility if I happened to loose the drone in bushes etc.
So I have the Master Air Screws coming.
At least I will have some orange visibility on the drone without extensive wrapping.
This darn hobby always gets you buying something....
In the fishing industry... 98% of the stuff in the tackle shop is to catch the angler... the rest to catch the fish.