I do this with syllable counts for my main contacts full names. Too lazy to learn morse code, and syllables work great except when there’s overlap (two people with same counts).
The reduction-and-pattern-matching (a kind of bloom filter, I suppose) reminds me of whistled Spanish:<a href="https://en.wikipedia.org/wiki/Silbo_Gomero" rel="nofollow">https://en.wikipedia.org/wiki/Silbo_Gomero
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<a href="https://en.wikipedia.org/wiki/Silbo_Gomero" rel="nofollow">https://en.wikipedia.org/wiki/Silbo_Gomero
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