The effects of high-pass and of low-pass filtering upon the intelligibility of speech in white noise.
This paper studied with trained, normal-hearing, young adults the effects of high-pass and also low-pass filtering on the intelligibility of speech mixed at S's ear with additive white noise at 4 S/N. Before each filter--S/N combination Ss were encouraged to adjust overall gain so as to yield seemingly optimum speech intelligibility. Gain chosen was relatively independent of S/N, being primarily a function of speech level. Results provided information on the contribution to intelligibility of various frequency ranges of the speech spectrum. Data were examined in relation also to the articulation index (AI). The intelligibility scores were in good agreement with the AI and yielded an improved understanding of the intelligibility of speech in noise.
D000328:Adult; D005260:Female; D005374:Filtration / Q000379:methods; D006801:Humans; D008297:Male; D009622:Noise / Q000009:adverse effects*; D013063:Speech Discrimination Tests / Q000379:methods*; D013067:Speech Perception / Q000502:physiology*