Table 3: Speech intelligibility rating (SIR) criteria.

Speech intelligibility rating (SIR)Score

Connected speech is intelligible to all listeners. Child is understood easily in everyday context.5
Connected speech is intelligible to a listener who has little experience of a deaf person’s speech.4
Connected speech is intelligible to a listener who concentrates and lip-reads.3
Connected speech is unintelligible. Intelligible speech is developing in single words when context and lip reading cues are available.2
Connected speech is unintelligible. Prerecognizable words in spoken language, primary mode of communication may be manual.1