Do you play a musical instrument? Do you have any friends or family who do?
As you'll know, musical instruments have different pitches.
A large drum has a lower pitch
than a small drum
A cello has a lower pitch
than a violin
A stretched drum skin has a higher pitch. Thick heavy strings make a low-pitched sound. Longer strings also produce a lower-pitched sound.
So, by changing aspects of the instrument, you can change the pitch. As you'll probably know, musical instruments of different sizes make sounds of a different pitch.
Let's have a closer look at all this.