Computerized measurement of speech intelligibility. II. Normative data from a 'closed response' test.
A Danish Four Alternative Forced Choice (4AFC) test was presented to normal-hearing and cochlearly hearing-impaired listeners in two background noises: a modulated, speech-spectrum-shaped noise and an 8-persons babble noise. At the presentation to the hearing-impaired subjects the test signals were given a frequency-dependent amplification in accordance with the POGO-fitting method. Normative data are presented which indicate that 4AFC is a valid test in spite of lack of homogeneity between the alternatives allowed. On the other hand, a learning effect is demonstrated which affects the reliability. A computer-assisted analysis of the obtained consonant confusions reveals a predominance of confusions among initial consonants having the same voicing.
Keidser
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Acoustics Laboratory, Technical University of Denmark, Lyngby.
D000328:Adult; D000368:Aged; D003051:Cochlea / Q000503:physiopathology; D001330:Electronic Data Processing; D005260:Female; D006309:Hearing / Q000502:physiology; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D007858:Learning; D008297:Male; D008875:Middle Aged; D009622:Noise; D010700:Phonetics; D013063:Speech Discrimination Tests; D013065:Speech Intelligibility; D014825:Vocabulary