Table 1.

Comparison of defined disorder levels in the study with SIR criteria

SIR score	Levels of intelligibility in SIR criteria	Levels of voice disorder in the study
1	Connected speech is unintelligible. Prerecognizable words in spoken language, primary mode of communication may be manual.	Level1
2	Connected speech is unintelligible. Intelligible speech is developing in single words when context and lip-reading cues are available.	Level2
3	Connected speech is intelligible to a listener who concentrates on lip-reading.	Level2
4	Connected speech is intelligible to a listener who has little experience of a deaf person's speech.	Level3
5	Connected speech is intelligible to all listeners.	Level4