Unfortunately I think they're locked behind the paywalls of various journals, or internal Harman research. You can piece a lot of together from his blog posts,

Unfortunately I think they're locked behind the paywalls of various journals, or internal Harman research. You can piece a lot of together from his blog posts, but it's rather labor-intensive. Google scholar will pick them up you type in "Sean Olive." For example: https://www.aes.org/e-lib/browse.cfm?elib=16486 https://www.aes.org/e-lib/browse.cfm?elib=16486 If anyone reading this finds a free way to access the original papers, please comment.