Derivation of primary parameters and procedures for use in speech intelligibility predictions.
The literature on various parameters that appear in the articulation index-type calculations of speech intelligibility is reexamined. Based on the reported data, the best estimates of these parameters and the most appropriate procedures for their use are suggested. These included: (1) the analysis and specification of the importance of various frequency bands to speech intelligibility; (2) the procedures used for measuring threshold and the calculation of threshold-based parameters used for predicting intelligibility of low-level speech; and (3) the calculation and measurement of relevant speech parameters. All results are given so that the calculations can be performed either in critical bands, 1/3 octaves, or octaves.
D000465:Algorithms; D006801:Humans; D009622:Noise; D011571:Psychoacoustics; D013018:Sound Spectrography; D013065:Speech Intelligibility; D013067:Speech Perception