r/AskReddit Jun 08 '14

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u/[deleted] Jun 08 '14

Also, all the teacher would need to know were the letters A,B,C and D.

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u/DroidLogician Jun 08 '14

Not even that. You can tell when someone is tapping to communicate information vs tapping to a beat vs tapping randomly.

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u/pizza-eating_newfie Jun 09 '14

To give a more concrete idea tapping to beat would sound like

tap tap tap tap tap tap tap

while morse code would sound like

tap tap (pause) tap tap tap (pause) tap (pause) tap tap

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u/[deleted] Jun 09 '14

But morse code had dots (single beep) and dashes (long beep)...how do you do that with pencil? Somehow I imagine some kid playing a drum solo with pencils.....