Text::Metaphone - A modern soundex. Phonetic encoding of words.
my $phoned_word = Metaphone('Schwern');
"Metaphone()" is a function whereby a string/word is broken down into
a rough approximation of its english phonetic pronunciation. Very similar in
concept and purpose to soundex, but much more comprehensive in its approach.
$phoned_word = Metaphone($word, $max_phone_len);
Takes a word and encodes it according to the Metaphone algorithm. The algorithm
only deals with alphabetical characters, all else is ignored.
If $max_phone_len is provided, Metaphone will only encode up to that many
characters for each word.
'sh' is encoded as 'X', 'th' is encoded as '0'. This can be changed in the
metaphone.h header file.
Metaphone algorithm changes
I have made a few minor changes to the traditional metaphone algorithm found in
the books. The most significant one is that it will differenciate between SCH
and SCHW making the former K (As in School) and the latter sh (as in Schwartz
My changes can be turned off by defining the USE_TRADITIONAL_METAPHONE flag in
Due to these changes, any users of Metaphone v1.00 or earlier which have stored
metaphonetic encodings, they should recalculate those with the new version.
Michael G Schwern <email@example.com>
Text::Soundex - A simpler word hashing algorithm Text::DoubleMetaphone -
Improved metaphone Text::Phonetic - A collection of phonetic algorithms
Binstock, Andrew & Rex, John. "Metaphone: A Modern Soundex."
Practical Algorithms For Programmers. Reading, Mass:
Addion-Wesley, 1995 pp160-169
Contains an explanation of the basic metaphone concept & algorithm and C
code from which I learned of Metaphone and ported this module.
Parker, Gary. "A Better Phonetic Search." C Gazette,
Vol. 5, No. 4 (June/July), 1990.
This is the public-domain C version of metaphone from which Binstock & Rex
based their own.. I haven't actually read it.
Philips, Lawrence. Computer Language, Vol. 7, No. 12
And here's the original Metaphone algorithm as presented in Pick BASIC.
Copyright (c) 1997, 1999, 2007-2008 Michael G Schwern. All Rights Reserved.
This program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.