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From: "Scott Dahlgren" <dahlgren@itsnet.com>
To: "___Lancair list" <lancair.list@olsusa.com>
Subject: audio warning
Date: Fri, 18 Jun 1999 06:36:45 -0600
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>>
Since we are bouncing ideas around, has anyone considered replacing all of
the warning lights with audio warnings? seems like it would work better with
less space.

also, does anyone know of a good audio warning system out on the market with
multiple warnings?

Scott


[Seems to me I saw a schematic recently (maybe in Kitplanes) for a multi-
channel vocal annunciator that uses the sound recording chips that have
recently come available.  The circuit I saw used a hierarchical
architecture which would make the most important announcement in the
case of multiple failures.  Personally I find the idea of audio warnings
interesting, but I don't think I'd want them to totally replace a
visual warning completely... once the announcement was made it could be
forgotten about unless there was a facility incorporated to repeat the 
alarm at some preset interval for the duration of the event.  This could 
also get a bit tedious (dangerous even) if the warnings start stepping
on critical communications during conversations with center or the tower.
Teaming an audio warning with a visual one that doesn't go away makes a
lot of sense to me, though, and I think it could be done relatively
easily.  Visual warnings don't have to take up lots of room... replacing 
large incandescent annunciators with LEDs cuts down on both the real
estate and overall current draw at the same time.  Just my opinions, of
course.                            <Marv>     ]

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