append ( syllable ) syllable = "" syllable += focal_phoneme # no syllable break else : syllable += focal_phoneme syllable += syllables_values # append last phoneme syllable_list. append ( syllable ) syllable = "" elif prev_value > focal_value < next_value : syllable_list. vowels ) = focal_value = next_value : syllable += focal_phoneme syllable_list. assign_values ( token ) # if only one vowel return word if sum ( token. :rtype: list(str) """ # assign values from hierarchy syllables_values = self. In (1) on the handout, we see a sonority hierarchy of the sort proposed by Clements (1990), where principal divisions are determined by major class features. :param token: Single word or token :type token: str :return syllable_list: Single word or token broken up into syllables. 1 Sonority, moraicity and the sonority hierarchy in OT. Note: Sentence/text has to be tokenized first. def tokenize ( self, token ): """ Apply the SSP to return a list of syllables. """ import re import warnings from string import punctuation from import TokenizerI from nltk.util import ngrams In Aronoff & Oehrle (eds.) Language Sound Structure: Studies in Phonology. On the major class features and syllable theory. Importantly, if a custom hierarchy is supplied and vowels span across more than one level, they should be given separately to the `vowels` class attribute. (2009) is a good benchmark for English accuracy if utilizing IPA (pg.
![sonority hierarchy example sonority hierarchy example](https://image.slideserve.com/141675/sonority-hierarchy-l.jpg)
The SSP is a universal syllabification algorithm, but that does not mean it performs equally across languages. The default implementation uses the English alphabet, but the `sonority_hiearchy` can be modified to IPA or any other alphabet for the use-case. Syllable breaks occur before troughs in sonority. The sonorous quality of a phoneme is judged by the openness of the lips.
#Sonority hierarchy example license#
# Natural Language Toolkit: Tokenizers # Copyright (C) 2001-2022 NLTK Project # Author: Christopher Hench # Alex Estes # URL: # For license information, see LICENSE.TXT """ The Sonority Sequencing Principle (SSP) is a language agnostic algorithm proposed by Otto Jesperson in 1904.