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That video

That video is a demonstration that our senses are a combined system that system moment by moment delivers our conscious reality. In that case, that what we see can over ride what we hear, even when we know what is going on.

More directly related to the concept of BT's is the demo below which demonstrates how what you KNOW effects what you hear. Watch along a few min to Poppy Crumm's demo, watch and listen carefully, this one only works once because the second time "you know".

https://www.youtube.com/watch?v=BYTlN6wjcvQ

The issue is, blind testing to be scientifically rigorous is very involved and it must be for life and death things like drug testing where all the people want a good result but only some get the real thing.

The utility in home audio is only when you have two things you want to compare and it's easy / fast to switch between them. To compare two amplifiers say, one would level match and listen to both switching back and forth trying different kinds of music until you had a track or two where the difference was most clear.

Then, in a way you can't see or know the result of, have a friend do the switching and see how much difference there is when you are only using your ears and not what you know about which is which.


Do this at your leisure, with your system, using music of your selection, no pressure, the point is answering the question "can I hear a difference with my ears alone, when I don't know which is which?"
If not, one might ask, how much is this addition worth?

There is a good reason why they don't have a little red light go on or the tester nod to you or have any clues when the tone goes on in a hearing test, it is limited to what your ears tell you.

I am not sure why that concept is so irritating for some.


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