Document ID: chunk:federal_register_of_legislation:F2023L00223:clause:1_192
Version: federal_register_of_legislation:F2023L00223
Segment Type: clause
Provision Reference: sch 1 cl 192
Character Range: 124931–127009

192     If there are problems in more than one area, each area (audibility, intelligibility, and functional efficiency) should be assessed, and the highest value selected as the WPI rating.
Table 7.4: Speech
%WPI        Criteria
Audibility  Intelligibility                                                                            Functional efficiency
  0         Audible in most situations, although may require effort.                                   Generally intelligible, although some sounds are difficult and some repetition may be needed.                      Speech can be sustained except for slowness and some hesitancy.
  10        Audible in quiet situations but problems with audibility in noisy environments.            Intelligible although inaccuracies may be frequent and there are obvious difficulties with articulation.           Speech can be sustained but is often discontinuous, interrupted, hesitant and/or slow.
  15        Voice tires rapidly, tends to become inaudible after a few seconds.                        Intelligible to family and close friends but strangers find speech generally unintelligible even with repetition.  Difficulty sustaining speech for more than brief periods even when speaking very slowly.
            Volume generally low.
            Volume very low.                                                                                                                                                                                              Laboured speech.
  20        Can whisper or produce volume that can be heard only with difficulty by close listener or  Mostly unintelligible, except for a few words.                                                                     Rate of sustained speech impractically slow.
            by telephone.
  30        Inaudible.                                                                                 Unintelligible.                                                                                                    No sustained speech.

7.5        Air passage defects