I was pondering to myself one day "how does a flute work?". It bothered me because I knew that our voices and reed instruments work by vibrating quickly, which pushes the air, creating a pressure wave. This couldn't be the case with flutes because the mouthpiece does not move.
All I could find was preschool explanations. I wanted the college professors explanation.
So lacking any support from the internet, I devised a theory on how the sound is produced when a flute is blown. I am looking for opinions and constructive analysis.
When a flautist blows over the hole just right, the hole disrupts the stream causing oscillating eddies.
These eddies are the pressure wave. They bounce around against the walls, causing the air inside to vibrate at the frequency of these eddies. When a hole is opened, like when the flautist releases their finger, the resonant property of the air is reduced, raising the frequency.
So how far off the mark do you suppose I am?
I am no master in fluid dynamics, I just thought it would be fun to do some science: observe, collect data, use data to form a theory to explain a phenomenon.