Tap code: Difference between revisions

Revision as of 19:05, 21 June 2024

Revision as of 14:57, 2 July 2024

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Because of the difficulty and length of time required for specifying a single letter, prisoners often devise abbreviations and acronyms for common items or phrases, such as "GN" for ''Good night'', or "GBU" for ''God bless you''.<ref name="pbs"/>

By comparison, [[Morse code]] is harder to send by tapping or banging, because itMorse requirescode theis abilitytime tobased createon twosignal clearlypresent distinguishableor formsnot ofpresent. tap, such as varying the pitch or volume. Morse code also takes longer to learn, where the tap system simply requires one to know the alphabet and the short sequence "AFLQV" (the initial letter of each row), without memorising the entire grid. For example, if a person hears four knocks, they can think "A... F... L... Q". If after a pause there are three knocks, they think "Q... R... S" to arrive at the letter S.

== History ==