I have never seen that JVC plastic head. Why are JVC binaural headphones different than any other headphones? Were there microphones in the headphones? Not much like microphones in the silicone ears on a KEMAR mannequin.
I earned Consumer Audio Associate from the Institute of High Fidelity 1977. I took college courses in physics of sound reproduction. I earned degrees in Engineering Science and Electronic Technology. I didn't work in the same stereo store that you did.
What's wrong with research? I used to do research in college. Did you notice the date on the magazine reference I sent you? I read that magazine article when it was first published. Did you notice that was a professional sound engineering publication, not retail consumer audio? Silicone ears were used back then. I've read many more scholarly articles than that.
We localize sound by Interaural Time Difference (ITD), Interaural Level Difference (ILD, head shadow), Head Related Transfer Function (HRTF), and head motion. The size and shape of our heads and ears and the distance between our ears generate the spatial cues that our brains process. The brain processes nerve impulses. Sound is converted to nerve impulses by the ears. You make it sound like the ears are not important at all.
My point exactly! Stereo channel level and time differences created by orientation of directional microphones, or spacing of microphones, or mixing console level controls, rendered by spaced speakers, do not come close to replicating natural ITD, ILD, or HRTF that the brain uses. Natural ITD, ILD, and HRTF locate the speakers and limit the stereophonic spatial illusion. Binaural recording heard through headphones, while simulating ITD, ILD, and HRTF, has its limitations.
I have made recordings with near-coincident directional microphones approximating ear spacing. They could be breathtaking heard through headphones. ITD is a very important direction cue not captured by coincident microphones, panned monophonic microphones, or widely spaced microphones.
The Haas Effect is not a sound localization cue. Haas found that sound was localized by the first arriving sound (at both ears). Localization is not effected by a later (10 to 40 msec) arriving sound from another direction. Haas Effect is used in time delay ambiance extraction and surround sound for speaker playback.
Madsen, E. Roerbaek "Extraction of Ambiance Information from Ordinary Recordings" Journal of the Audio Engineering Society October 1970 Volume 18 Issue 5 pp 490-496
or
Mitchell, Peter W. "Time-Delay Systems" Stereo Review October 1978 Volume 41 Number 4 pp 87-92
You were the one who started sending links to Wikipedia articles. You should read the article in the link you sent and the articles in the links I sent you.