Recognition of multiply degraded speech by young and elderly listeners.
This study investigated the hypothesis that age effects exert an increased influence on speech recognition performance as the number of acoustic degradations of the speech signal increases. Four groups participated: young listeners with normal hearing, elderly listeners with normal hearing, young listeners with hearing loss, and elderly listeners with hearing loss. Recognition was assessed for sentence materials degraded by noise, reverberation, or time compression, either in isolation or in binary combinations. Performance scores were converted to an equivalent signal-to-noise ratio index to facilitate direct comparison of the effects of different forms of stimulus degradation. Age effects were observed primarily in multiple degradation conditions featuring time compression of the stimuli. These results are discussed in terms of a postulated change in functional signal-to-noise ratio with increasing age.
Gordon-Salant
S
S
Dept. of Hearing and Speech Sciences, University of Maryland, College Park 20742, USA.
Fitzgibbons
P J
PJ
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001301:Audiometry, Pure-Tone; D006309:Hearing; D006319:Hearing Loss, Sensorineural / Q000175:diagnosis; D006801:Humans; D009622:Noise / Q000009:adverse effects; D010470:Perceptual Masking; D013061:Speech Acoustics; D013067:Speech Perception; D013997:Time Factors