[time-nuts] Re: Clock displays -- eye response

[Brooke Clarke]

Hi Hal:

There has been some recent research into illusions related to sight and sound.
https://en.wikipedia.org/wiki/McGurk_effect - related to speech
and search "audio optical illusion"

I like a crisp "tick" for clock human synchronization.

I wonder why there has not been more done with military "Have Quick" for time synchronization?
https://en.wikipedia.org/wiki/HAVE_QUICK
It's been a part of the PLGR and DAGR GPS receivers and I expect also for the military embedded versions for a long time.
https://prc68.com/I/PLGR.shtml#Time
https://prc68.com/I/DAGR.shtml#HQ1PPS
Also things like the O-1814/GRC-206 Reference Frequency Rb Oscillator make us of it.
https://prc68.com/I/O1814.shtml

-- 
Have Fun,

Brooke Clarke
https://www.PRC68.com
axioms:
1. The extent to which you can fix or improve something will be limited by how well you understand how it works.
2. Everybody, with no exceptions, holds false beliefs.

-------- Original Message --------
> Does anybody have numbers for how long it takes for a visual signal to get
> into your brain?
>
> I think it's around 250 ms for a human to push a button when a light goes on.
> Less if the penalty for false pushes is low.  I don't have a handy URL to back
> that up.
>
> But that's in and back out.  I assume the "in" step is only part of that.
>
> Are flashes out of the corner of your eye that might indicate danger faster?
>
> If 2 lights go on at close to the same time, how far apart do they have to be
> before you can notice that one goes on first?
>
>