August 2019 (p28-33) Hi Fi News and Record Review has a article titled "Better Headphone Testing". KH goes into detail about exactly how he tests and why he does it the way he does. I've been reading this mag for decades (40 years +/-) and have to say that under Paul Miller's reign -I've yet to buy a issue without either learning something or at least getting some long standing belief challenged. Ya -most of the equipment reviews are for ultra high end stuff that doesn't interest me - but the columnists monthly pages are always interesting and their how it works articles of great value to me. Expensive here in the USA -IMHO worth every penny.