What vibrats on a flute to make a noise?

Answer 1

Acoustically speaking, this tube is considered to be open at both ends, since the mouth hole acts as if it were an open end. So if we close all the note holes, the resonator-tube can be seen like this Because the tube walls constrict air inside, that air acts like a stiff spring, fairly independent of the air surrounding it. When the air stream at the mouth hole begins fluctuating in and out of the tube, this air-spring receives a rapid succession of tiny pushes and begins vibrating. It does not, however, vibrate at the same rate as the vibration at the mouthhole. The pushes given by the vibration at the mouth hole are strong enough to start the air-spring moving, but not strong enough to control the rhythm of the air-spring's vibrations. Instead, the air-stream uses the energy imparted to it by these pushes to start vibrating in its own natural rhythm. This natural rhythm is determined by the length of the air-spring. Acoustically speaking, this tube is considered to be open at both ends, since the mouth hole acts as if it were an open end. So if we close all the note holes, the resonator-tube can be seen like this Because the tube walls constrict air inside, that air acts like a stiff spring, fairly independent of the air surrounding it. When the air stream at the mouth hole begins fluctuating in and out of the tube, this air-spring receives a rapid succession of tiny pushes and begins vibrating. It does not, however, vibrate at the same rate as the vibration at the mouthhole. The pushes given by the vibration at the mouth hole are strong enough to start the air-spring moving, but not strong enough to control the rhythm of the air-spring's vibrations. Instead, the air-stream uses the energy imparted to it by these pushes to start vibrating in its own natural rhythm. This natural rhythm is determined by the length of the air-spring. Acoustically speaking, this tube is considered to be open at both ends, since the mouth hole acts as if it were an open end. So if we close all the note holes, the resonator-tube can be seen like this Because the tube walls constrict air inside, that air acts like a stiff spring, fairly independent of the air surrounding it. When the air stream at the mouth hole begins fluctuating in and out of the tube, this air-spring receives a rapid succession of tiny pushes and begins vibrating. It does not, however, vibrate at the same rate as the vibration at the mouthhole. The pushes given by the vibration at the mouth hole are strong enough to start the air-spring moving, but not strong enough to control the rhythm of the air-spring's vibrations. Instead, the air-stream uses the energy imparted to it by these pushes to start vibrating in its own natural rhythm. This natural rhythm is determined by the length of the air-spring. Acoustically speaking, this tube is considered to be open at both ends, since the mouth hole acts as if it were an open end. So if we close all the note holes, the resonator-tube can be seen like this Because the tube walls constrict air inside, that air acts like a stiff spring, fairly independent of the air surrounding it. When the air stream at the mouth hole begins fluctuating in and out of the tube, this air-spring receives a rapid succession of tiny pushes and begins vibrating. It does not, however, vibrate at the same rate as the vibration at the mouthhole. The pushes given by the vibration at the mouth hole are strong enough to start the air-spring moving, but not strong enough to control the rhythm of the air-spring's vibrations. Instead, the air-stream uses the energy imparted to it by these pushes to start vibrating in its own natural rhythm. This natural rhythm is determined by the length of the air-spring.