Why is there a sound change when glasses are struck with different levels of water in each of them - Science - Sound

Question

Why is there a sound change when glasses are struck with different
levels of water in each of them?

Pintu B. · Accepted Answer

Dear Student ,
Here in this case ,
The inside of a drinking glass is a resonant cavity with one open end, much like an organ pipe
 As you fill the glass with liquid, the length of the pipe is decreased, and the pitch of the "note" increases
A particle in a smaller space willl produce shorter waves
 So, more liquid is added, the space become smaller and so the waves become shorter, increasing the pitch of the sound you hear

Hope this helps you to clear you doubt
Regards

Why is there a sound change when glasses are struck with different levels of water in each of them?