Since different voices are differently pitched the device is rigged to ignore absolute pitch but to respond to relative pitch variations which occur in sequence in certain word combinations as pronounced by most speakers. Different combinations of variations close different combinations of relay circuits, and each combination of circuits is hooked up to the appropriate wax cylinder which supplies the answer, or to the proper motor which moves the robot as directed. Thus Alpha may answer "Seven" when asked "How many days in the week?" but remains dumb if the question is phrased "A week has how many days?"Basically, Alpha the robot understands African drum language.
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posted by filthy light thief at 2:03 PM on August 12, 2010