| The strings of a violin produce a sound when they are plucked. |
 |
The vibrating strings make the air and the material of the violin vibrate and allow the sound to be heard. | ||
| If the prongs of a tuning fork are hit, they produce a sound. |
 |
The prongs vibrate and a faint sound can be heard. If the handle is placed on a wooden board, this vibrates too and the sound increases. | ||
| If the skin of a drum is struck it makes a sound. |
 |
The drum skin vibrates, as does the drum material and the sound can be heard. |
