Metaphone
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Metaphone is a phonetic algorithm, an algorithm for indexing words by their sound, when pronounced in English. The algorithm produces variable length keys as its output, as opposed to Soundex's fixed-length keys. Similar sounding words share the same keys.
Metaphone was developed by Lawrence Philips as a response to deficiencies in the Soundex algorithm. It is more accurate than Soundex because it uses a larger set of rules for English pronunciation. Metaphone is available as a built-in operator in a number of systems, including later versions of PHP.
The original author later produced a new version of the algorithm, which he named Double Metaphone, that produces more accurate results than the original algorithm.
[edit] See also
[edit] External links
- Survey of Phonetic Matching
- Open Source Spell Checker
- Page for PHP implementation of Metaphone
- Project Dedupe
- Ruby implementation included in http://rubyforge.org/projects/text
- 'Sounds alike' word generator
[edit] Downloadable Implementations
- Soundex, Metaphone, and Double Metaphone implementation in Java
- Soundex, Metaphone, Caverphone implementation in Python
- Text::Metaphone Perl module from CPAN
- Text::DoubleMetaphone Perl module from CPAN
- OCaml implementation of Double Metaphone
- PHP implementation by Stephen Woodbridge
- Ruby implementation included in http://english.rubyforge.org
- Ruby implementation included in http://rubyforge.org/projects/text/
- 4GL implementation by Robert Minter
- CodeProject's article about double metaphone implementations
- FileMaker Pro custom function, requiring FileMaker Pro Advanced to implement
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