![]() ![]() ![]() For example, lips are closed at the start of saying the letter "B" but open at the beginning of the letter "D" making these otherwise similar-sounding letters more easily discriminated when looking at the speaker. Also, the lack of visual cues during oral communication can cause confusion. The lack of high frequencies on standard telephones makes it hard to distinguish an 'F' from an 'S' for example. It is used to spell out words when speaking to someone not able to see the speaker, or when the audio channel is not clear. Should an efficient American secretary, for example, know several alphabets-one for use on the telephone, another to talk to the telegraph operator, another to call the police, and still another for civil defense? Įach word in the spelling alphabet typically replaces the name of the letter with which it starts ( acrophony). Often, each communications company and each branch of each country's military developed its own spelling alphabet, with the result that one research effort documented a full 203 different spelling alphabets, comprising 1600 different words, way back in 1959, leading the author of the report to ask: A spelling alphabet, word-spelling alphabet, voice procedure alphabet, radio alphabet, or telephone alphabet is a set of words used to stand for the letters of an alphabet in oral communication.Ī large number of spelling alphabets have been developed over the past hundred-plus years, with the first ones being used to overcome problems with the early wired telephone networks, and the later ones being focused on wireless two-way radio (radiotelephony) links. ![]()
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