Caverphone

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The Caverphone phonetic matching algorithm was created in the Caversham Project at the University of Otago in New Zealand in 2002. The algorithm allows accents present in the study area (southern part of the city of Dunedin, New Zealand).

The exact algorithm is as follows:

1. Convert to lowercase
2. Remove anything not A-Z
3. If the name starts with
   1. cough make it cou2f
   2. rough make it rou2f
   3. tough make it tou2f
   4. enough make it enou2f
   5. gn make it 2n
   6. mb make it m2
4. Replace
   1. cq with 2q
   2. ci with si
   3. ce with se
   4. cy with sy
   5. tch with 2ch
   6. c with k
   7. q with k
   8. x with k
   9. v with f
   10. dg with 2g
   11. tio with sio
   12. tia with sia
   13. d with t
   14. ph with fh
   15. b with p
   16. sh with s2
   17. z with s
   18. any initial vowel with an A
   19. all other vowels with a 3
   20. 3gh3 with 3kh3
   21. gh with 22
   22. g with k
   23. groups of the letter s with a S
   24. groups of the letter t with a T
   25. groups of the letter p with a P
   26. groups of the letter k with a K
   27. groups of the letter f with a F
   28. groups of the letter m with a M
   29. groups of the letter n with a N
   30. w3 with W3
   31. wy with Wy
   32. wh3 with Wh3
   33. why with Why
   34. w with 2
   35. any initial h with an A
   36. all other occurrences of h with a 2
   37. r3 with R3
   38. ry with Ry
   39. r with 2
   40. l3 with L3
   41. ly with Ly
   42. l with 2
   43. j with y
   44. y3 with Y3
   45. y with 2
5. remove all
   1. 2s
   2. 3s
6. put six 1s on the end
7. take the first six characters as the code

[edit] Examples

Lee -> lee
lee -> l33
l33 -> l
l -> l111111
l111111 -> l11111

Thompson -> thompson
thompson -> th3mps3n
th3mps3n -> t23mps3n
t23mps3n ->  tmpsn
tmpsn111111 -> tmpsn1

[edit] See also

[edit] External links

• Project Dedupe http://dedupe.sourceforge.net