Effect of speaker age on speech recognition and perceived listening effort in older adults with hearing loss.
OBJECTIVE
Older adults exhibit difficulty understanding speech that has been experimentally degraded. Age-related changes to the speech mechanism lead to natural degradations in signal quality. We tested the hypothesis that older adults with hearing loss would exhibit declines in speech recognition when listening to the speech of older adults, compared with the speech of younger adults, and would report greater amounts of listening effort in this task.


METHODS
Nineteen individuals with age-related hearing loss completed speech recognition and listening effort scaling tasks. Both were conducted in quiet, when listening to high- and low-predictability phrases produced by younger and older speakers, respectively.


RESULTS
No significant difference in speech recognition existed when stimuli were derived from younger or older speakers. However, perceived effort was significantly higher when listening to speech from older adults, as compared with younger adults.


CONCLUSIONS
For older individuals with hearing loss, natural degradations in signal quality may require greater listening effort. However, they do not interfere with speech recognition-at least in quiet. Follow-up investigation of the effect of speaker age on speech recognition and listening effort under more challenging noise conditions appears warranted.
University of Canterbury, Christchurch, New Zealand. megan.mcauliffe@canterbury.ac.nz
Megan J
MJ
McAuliffe
Phillipa J
PJ
Wilding
Natalie A
NA
Rickard
Greg A
GA
O'Beirne
D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold / Q000502:physiology; D001844:Bone Conduction / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D006309:Hearing / Q000502:physiology*; D034381:Hearing Loss / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010700:Phonetics; D011304:Presbycusis / Q000503:physiopathology*; D015203:Reproducibility of Results; D013060:Speech; D013061:Speech Acoustics; D013067:Speech Perception / Q000502:physiology*; D013069:Speech Reception Threshold Test