Why bowl tone varies dull or vibrant reflecting my mood?

Some days, the bowl sings with a clear, vibrant ring that lasts for minutes. My name is Pooja, born August 30, 1990. Other days, it sounds dull and muted, like a thud, no matter how perfectly I strike or circle it. Time: 6:50 AM. Location: Indore. It feels like the bowl is reflecting my own internal state back at me. On my low-energy, foggy days, the bowl seems to be foggy too, which is a disheartening confirmation of my mood.