On Wednesday, November 19, 2014 10:54:34 AM UTC-5, waremark wrote:
...the voice process is too slow for a real threat.
...I think it takes a fraction of a second to take in with
peripheral vision the clock face display indicating the direction
of the threat, almost simultaneously scanning outside the cockpit.

Right - Voice is not the fastest. It takes a while for the message,
and it can get lost (for example if you're receiving a radio message).

The fastest is a large simple graphical "pointer" in your field
of vision, accompanied by a warning alarm. A visual presentation
is less effective when:
- its not already in your field of vision (turning head takes lots of time)
- poor contrast
- a complicated/busy/fussy display cannot be comprehended instantaneously
- buried low on the panel

Voice helps in the above situations...

Here's the SN10 presentation (4 O'clock high):
http://www.nadler.com/sn10/FLARMcol.png
We also changed the Butterfly presentation from the original to
make comprehension instantaneous...

Hope that helps frame the problem!
Best Regards, Dave

PS: We built many voice applications (phone), some quite notorious ;-)
Time for user to comprehend and use is always an issue.
Think about various annoying automated phone services you've used.