How air column frequency manifests as the pitch on the flute. How the frequencies change between flutes and within the same flute as you play various notes.
Kindly cover the scientific reason for the hissing sound from flute in upcoming videos. No one actually could accurately address the scientific theory behind the hissing sound. The guess is that if the angle of blowing is not correct and air entering in the hole is obstructed by the returned air then hissing sound is produced. Not sure about the actual reason.
The explanation here pertains to flutes designed to play equal-temperament notes. This is fine for Western music, Indian flim music, and generally orchestral music. However, if you want to play Indian classical music, one should use just intonation - this is a different way of creating notes of the octave that generates slightly different frequencies among the notes. Several years ago, I explained about this in a video showing how to adjust a tuner for purposes of Indian music.
We need to assume the stream is constant. Air has two escape paths. One through the note hole and another at the edge itself. Air stream is alternating between these two escape routes. Flow of air over the edge must be causing the drop of pressure. The same reason as to why air flowing over a sheet of paper causes it to flutter. Need a physicist to confirm.
There are two different aspects in play. 1. Air column vibrates at some frequency. It produces sound. 2. Length of the air column determines the frequency of vibration and hence the note. #2 is intuitive to understand. As we open/close the note holes, the point at which air escapes from the flute changes. That changes the length of the air column and hence frequency change. #1 is not intuitive. Why air column vibrates at all when one end is open? I guess your question is related to this. See my video about the function of the edge of the blow hole. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-l-JDUH7Ivwk.htmlfeature=shared Scientifically, here is an explanation “The jet of air from the player's lips travels across the embouchure-hole opening and strikes against the sharp further edge of the hole. If an air jet is disturbed, then a wave-like displacement travels along it and deflects it. (A rising plume of smoke in still air can illustrate this motion.) For a flutist's jet, such a displacement can cause it to flow alternately into or out of the embouchure hole. The speed of this displacement wave on the jet is about half the air-speed of the jet itself (which is typically in the range 20 to 60 metres per second, depending on the air pressure in the player's mouth). In operation, the jet can be displaced by the sound vibration in the flute tube, which causes air to flow into and out of the embouchure hole. If the jet speed is appropriate for the frequency of the note being played, then the jet will flow into and out of the embouchure hole at its further edge in just the right phase to reinforce the sound and cause the flute to produce a sustained note.” Reference: newt.phys.unsw.edu.au/jw/fluteacoustics.html#airjet
If your question is about #2 aspect listed in my comment, then the point is that once the air column is vibrating, it is not the pressure but the length of the air column is changing as we open and close note holes. Even though the flute is open ended, air escapes from the earliest available open hole. That’s why the air column length changes with our fingering.
I presume when you test, you find G to be 396Hz. When they say ‘tuned to 440Hz’, they mean A is set to 440 Hz. That is the standard. When A is set to 440 Hz, G should be 392 Hz. Your measurement says 396, and the difference is negligible. The difference could be a testing error. Even if it is the making error, it is really minor and negligible.
@@VindyDays Sir, don't collaborate with him. I was the one who did the research now he is trying to get credit for my original worrk. Do not collaborate with him.
