Bullroarer session at Black Rock, Somerset with David Oliver 

I believe that what causes the bullroarer to make its sound is a phenomenon known as flutter. Flutter happens when an airfoil travels so fast through the air that the airflow around it becomes turbulent, causing the airfoil to vibrate. Flutter is good for a bullroarer; but it's VERY BAD for an aircraft. Flutter is why all modern airplanes have an "Overspeed" warning alarm. For obvious reasons, flutter will damage an aircraft's wings.

Perfekte Kulisse, der den Klang enorm verstärkt.

Here because I'm reading "Tides of Fire" and I wanted to remember what this sounded like.

Thanks for cutting the grass d.s. 😁

Calling the Spirits of Earth, whoa, sounds great !! I would love to watch a longer version of it, if possible : ))))) xx

Beautifully captured, Andy. All the sounds and visuals are well received by my senses : )))))

Dune comment brought me here😮😮😮😮What a most magical soooound...The frequency to the aboriginal Gods

Epic sound Andy. I can see and hear that the acoustics were good there. All the best. Mark

G'day! Great video! 😁👍

sweet job

"Message received / understood " ☆

excellent location

How far away can it be heard

This guy is a mad rooter

I want one! Bet that sound carries for miles mate 😁

When you're in Somerset (or anywhere in the southwest really) and you hear a noise like that , run , run fast because its more likely a real bull 😂😂

Haha, funny thing! :-) Close up!!! Greetingz, Wim

Its a twister auntie em it's a twister

😂 😂 Any Kalenjin seeing this...

And just like that all strange sky sound videos were debunked 😆

I really appreciate your effort. I do. My background is in audio. It only took a few seconds to notice something is off. Video and audio don't match. Audio was probably recorded someplace else with the cawing edited in to blur the fact. But even if this was recorded on site, your editing destroyed the authenticity. You're a video guy who likes editing a lot and having different camera angles, slo-mo, etc. Please stick to synced audio/multi-cam editing instead of fake dubbing. I nevertheless liked the video.👍

Beautiful ancient European instrument often misattributed to Australian aboriginal (then again so is the spear thrower, and many other things - yet the oldest extant examples are almost always from Germany or Poland (i.e. formerly Prussia).

Sounds... racist?