1. An aural similarity measuring system for measuring the aural similarity of texts comprising: a text input interface; a reference text source; an output interface; and a processor adapted to convert the input text into a string of phonemes, to adjust the phoneme string of the input text and/or a phoneme string of a reference text so that the two phoneme strings are equal in length, and to assign a score to the reference text representative of the similarity of the two phoneme strings, which score is output via the output interface.