>Measurements
https://sai.squig.link/
https://crinacle.com/graphs/headphones/graphtool/?share=Harman_AE_OE_2018_Target
https://www.audiosciencereview.com/forum/index.php?pages/Reviews/
https://old.reddit.com/r/oratory1990/wiki/index/list_of_presets
https://diyaudioheaven.wordpress.com/
https://www.stereophile.com/content/innerfidelity-headphone-measurements

>Recommended information
https://wiki.installgentoo.com/index.php?title=Headphones
https://diyaudioheaven.wordpress.com/tutorials/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5016825/
https://nwavguy.blogspot.com/2012/04/what-we-hear.html

Videos:
Measurements 101 by Dan Clark - Canjam NYC 2022 Seminars
https://youtu.be/6eYGTVx3WcE
Audio Blind Tests and Listener Training
https://youtu.be/0KX2yk-9ygk
D/A and A/D | Digital Show and Tell (Monty Montgomery @ xiph.org)
https://youtu.be/cIQ9IXSUzuM
Digital Audio: The Line Between Audiophiles and Audiofools
https://youtu.be/IiZqYnd5g8M

More /hpg/ videos:
https://pastebin.com/TcTS8Tsn