In article ,
Bob Lombard wrote:
You are /enveloped/ in an egg-shaped chair... hmm; I think that could
be claustrophobic. Well, unless you like the idea of returning to the
womb.

Seems like the same effect would result without the chair. Just have
the speakers in similar positions while listening to a 'binaural'
recording. Eh?
Al Kooper is said to have such a chair! I remember hearing "Riders on
the Storm" in one in a department store way back in the seventies.
Stephen