Blowing air into a whistle causes air to vibrate inside the whistle.
If the persist, blow a whistle loudly into the mouthpiece.
Blowing air and causing it to vibrate makes a loud noise.
blowing and causing air to vibrate makes what

[1] expand
[2] evaporate
[3] kinetic energy
[4] waves
[5] Energy.
[6] combine
[7] loud noise
[8] energy