That is the material had many defects in it s structure like the ones described in this wiki page and the heat from the water gave the structure enough energy to relax and heal them i ve witnessed a ceramic cup that started to make bell like noises when i poured myself a tea in it an.
Ceramic pot making noise.
I make sound fx for people to use in their projects.
The odd thing is.
Film youtube video etc.
The mixture of temperatures causes stress on the pot.
If you do this it can actually make the pot explode so always be careful.
I am new to wheel thrown pottery.
The sound that s coming out of your pot is mostly due to boiling.
When the water reaches its boiling point bubbles start to form near the bottom of your pan because the bottom is closer to the heat source.
I am offering this service.
Inside these bubbles are water vapor which rises to the top and pops.
It s a rather chaotic process and usually loud.
All of my uploads have a creative commons license.
The effect in the top picture was accomplished by melting and fusing glass on the pot.
For more about firing glass with pottery visit combining glass with pottery.
When you hear a pinging pot it typically isn t complete cause for alarm but instead it s a beginner s mistake that can happen.
Every 15 mins to an hour they make a high pitched ping type of noise.