name twenty musical instruments ,and tell how the sound is produced and propagated by them?

1. Drum - Stretched Membrane
2. Tabla - Stretched Membrane
3. Mridangam - Stretched Membrane
4. Guitar - Stretched String
5. Violin - Stretched String
6. Veena - Stretched String
7. Sitar - Stretched String
8. Grand Piano - Stretched String
9. Cello - Stretched String
10. Banjo - Stretched String
11. Harp - Stretched String
12. Oboe - Air Column
13. Clarinet - Air Column
14. English Horn - Air Column
15. Trumpet - Air Column
16. Trombone - Air Column
17. Tuba - Air Column
18. Flute - Air Column
19. Piccolo - Air Column
20. Recorder - Air Column
21. Ocarina - Air Column
22. Saxophone - Air Column

the three major classes are 1)Stringed, 2)wind and 3)percussion instruments

1)they have a set of different types of strings tuned accordingally. At one end they are fixed at a bridge and then at the other end they are they are fixed by the keys. Sound by them is produced by plucking the strings which produces vibration.

2)a vibrating air coloumn produce a musical sound.

3)a vibrating skin or membrane produce a mucical sound in case of percussion instruments, when they are sturk then they produce this sound by moving up and down, and thus producing a vibration.