ok, but why?
The "headphone experience" is fairly well explored and forms a tight cluster with few outliers: in-ear, on-ear, over-ear, head-speaker.
Some of the outliers are interesting, the AKG K1000 comes to mind, Jecklin Float, some Stax models, ... but each of those has characteristics that limit its application.
I would be concerned that any non-standard headphone might run up against similar constraints: head fit, isolation, interaction with the surroundings.
....., but then again, if your brainfart breaks through a few of those constraints, please go for it!