a) Does a sensor exist that detects viewers through the piece--which consists of a piece of linen with a photo laminated to it?
b) What kind of sensor picks up a transmitted signal from another sensor and how is this calibrated? Would sonar work in this case, leading to the question below:
c) What kind of a signal must the unit transmit? Is it audible?
SMV sensor with the plug.
b) What kind of sensor picks up a transmitted signal from another sensor and how is this calibrated? Would sonar work in this case, leading to the question below:
c) What kind of a signal must the unit transmit? Is it audible?
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