Le 2022-12-30 à 13 h 33, brian.k...@sorbonne-universite.fr a écrit :
The main issue in my experience has been the acoustics within any type of headphone cavity which make creating directional wavefronts almost impossible. For example, the prototype of Greff used an open grid with speakers, providing interesting results, but once enclosed for better frequency bandwidth and a commercial device the same results were not achieved.
Because individualized HRTF measurements are made using in-ear microphones, using in-ear monitors for binaural reproduction seems an easy strategy to avoid effects of headphone cavities, but there must be other (or similar) effects when the drivers are closer to the eardrums. I suppose that when the reproduction drivers are not directly in the ear canal, they better be at certain distance to immerse the whole body or at least the head (not only the ears) with synthesized wavefronts.
Le 2022-12-30 à 16 h 58, glardner a écrit :
This is more ot less what OSSIC Corp tried to do with Ossic X. They raised nearly $3M on Kickstarter but managed to burn through most of it without delivering more than a few dozen prototypes and, they claimed, a few hundred early production examples. They had four loudspeakers in each side of the headphones and fancy software to control them.
I like Umashankar's idea of an "audio cage", but the sweet spot must be small.
We may get individuated HRTFs before nuclear fusion, and setting up loudspeakers at home is already possible, so... Qu'est-ce qu'on attend pour être heureux?
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