does your cat have two purrs?

[SodaStreamy]

Hello just noticed something and wondered if this is something all cats have.

Was giving her a stroke and she purred away then for some reason I lent my head on her, my ear was on her hip area and I can hear another purr within her body that is at different rate to her external purr.

I'm just curious really as to whether all cats have this and I've only just discovered this after having cats for 20 years?

[cozietoesie]

Never noticed to be honest. I'll have to hunker down tonight to see. (He's flat out at the moment so no purring at all.)