Sound can also be used
for triggering. The Shutter-Beam audio circuit can be set so that
anything from a whisper to a shout can trigger an event. Once a sound
exceeds the audio sensitivity of the Shutter-Beam a picture is taken.
Easy! (No reflector to set.)
It's Reliable! (Once
audio sensitivity is exceeded, POW)
(Don't like the results, do it again)
It's Patient! (Timing
is everything/The Shutter-Beam waits for the sound)
Sound propagates at approximately 1ft/mS.