A.T.R.
Audio Test Robot

Above:  The robot has a microphone on a short boom on the rear end,
and the mic amp/signal conditioner is the small board  on the other side rear. The
eventual goal is for the robot to understand a small vocabulary of word commands.

Updated 6/5/16
Key Search Words: ROBOT, ROBOTICS, ROBOTIC VISION, ARTIFICIAL INTELLIGENCE, AI

 

      
The first step
      in getting your robot to understand verbal commands and recognize
      background sound events is to simply respond to the audio by
      sampling it periodically with the micro controllers A/D converter
      and triggering a response when a minimum threshold is reached.
      Then after that response, sit and wait until the next sound event.

      
To accomplish this,
      the robot first takes a reading when the power switch is first
      turned on, and sets that background level + a small tolerance
      as the reference level. Then any sound sampled after that over
      that reference triggers the response. In this case, the small
      DC offset measures around 45 ADU's and so we add 5 for a reference
      threshold of 50 or so. The robot is programmed to beep when it
      hears such a sound, then move forward a few inches in response.
      Then it waits for the next event.

      
Notice Im saying
      different words to trigger the robot! It does not yet know different
      words but only hears sound levels of ANY word.

      

        

          

            
You Tube
            Movie Clip of voice activation HERE
          
 This
            very short clip shows the robot responding to my voice three
            times, using different words.This is the first step in the process
            of many to get the device to understand the spoken word and respond
            per instructions.
 
        
      

Previous Uploads on this robot:

   1.  The sound envelope waveforms with the mic amp board

 

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