SOUND TRIGGERING

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.

It's Easy! (No reflector to set.)
It's Reliable! (Once audio sensitivity is exceeded, POW)
It's Repeatable! (Don't like the results, do it again)
It's Patient! (Timing is everything/The Shutter-Beam waits for the sound)

            THE TRICK: Sound propagates at approximately 1ft/mS.

 

Sound triggering illustration


Sound triggering is easy to set up, because there is no reflector. The trick to sound triggering is understanding that sound takes time to propagate to the Shutter-Beam 
from its point of origin.

 

Illustration of sound propagating at 1ft./mS

 


Sound propagates at approximately 1 foot/1 millisecond, the distance from the sounds origin to the Shutter-Beam determines how much movement is going to happen before triggering. The easiest way to determine the movement is take several pictures and move the Shutter-Beam towards and away from the sound origin. Chose the picture with the best results.

 Note: A more accurate way to take this cork picture is to use the IR Beam. Just put the leading edge of the beam where you want the cork to be when the picture is taken.

 

What subjects can you think of photographing with sound triggering? Email me.


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