Have you watched the BeeB programme yet?
I watched the Horizon programme.
I saw nothing that was directly related to hi-fi as a hobby.
I saw a demonstration that we lip read when listening to people speak. However loudspeakers have no lips.
That our colour perception is determined by the colours surrounding a small shape that we may be looking at.
That a vibrating belt worn a lot can become automatically accepted as a direction finding device by the brain.
That a blind man can ride a bicycle in a wobbly way on a wide cycle path by clicking his tongue to guide himself.
That there's an automatic reflex when we unexpectedly see a hammer hitting a plastic hand that we've been watching whilst having our fingers tickled by a paint brush.
That a bunch of students were unable to tell what flavours of fruit juice they were drinking when they were dyed unusual colours - eg light green for strawberry juice.
The premise of the programme was that our senses are interlinked and that one sense can be over-ridden in certain circumstances by an input from another sense.
What's this got to do with hi-fi?
Listening to hi-fi is a dual sense activity. The sense of hearing and the sense of touch from the vibration of lower frequencies. There doesn't seem to be much scope for the sense of hearing to be over-ridden in this situation.
The only vaguely relevant hi-fi situation that I can think of is in a demonstration situation where there were some sort of "dirty tricks" going on or a large amount of expectation bias. I think this deserves a new thread: "Dirty and not so dirty tricks used in hi-fi demonstrations" where we can discuss ways to bias a hi-fi demonstration. With the intention that if we know the techniques that can be used to throw a demonstration we might have some ammunition with which to counter them.