I wonder what's the physical basis of perfect pitch? Neurons growing in a certain pattern? When I was in my late teens I went to a concert which was way too loud - for a few years after that incident I could hear something akin to modulation distortion if the sound was loud enough - a sort of low ringing like what you hear if you spin a suitcase wheel using your hand. It was unpleasant, but surprisingly helpful in id…
Nerd note: the name "Perfect pitch" is something of a misnomer because the frequencies the note names refer to is a social construct which has changed over time[1]. A=440 is the predominant concert pitch now but since "pitch taste" generally gets brighter/sharper over time A=443 is used now by the Berlin Philharmonic for example instead as a concert pitch. In the Baroque period we know (from looking at surviving fixed-pitch instruments like historical organs) that their reference A was generally a bit flatter than that but it's not consistent. Nowadays musicians playing historically-informed performances have settled on A=415 as a common baroque pitch standard because it's helpful for everyone to agree so they can have instruments made that play that pitch standard.
[1] https://en.wikipedia.org/wiki/Concert_pitch#History_of_pitch...