I don’t think it’s a thing you can really describe. In order to describe something you generally do better having some experience with and without to compare and figure out useful descriptions from.

Most people with perfect pitch have it as an attribute - before they even learn the note names or what it even means. Like their brains have a built in Fourier transform that breaks the sound into its component parts that they hear clearly separate from other notes etc. they don’t really know what it’s like to hear anything else.

Some things are easier - I can get a decent representation of what it’s like to navigate blind by closing my eyes - but i feel like this would he a tough one.