Ok, have your opinion here, but also acknowledge that you made someone here feel shite. All you've done is say 'but technically I wasn't wrong' when really you should take some of what they're saying onboard, say 'hm, I didn't know that about vocal fry - I'll take a closer look some time' and then apologise for making someone feel marginalised, whether it was an innocent mistake or not.

I got language policed for disability related slurs that I didn't realise were slurs not so long ago. Totally innocent mistake. I was ill informed. Didn't mean to cause offence. Yet still, I was wrong, and I made someone feel bad.