Effects of Age on Speech-in-Noise Identification: Subjective Ratings of Hearing Difficulties and Encoding of Fundamental Frequency in Older Adults
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초록
Numerous studies have indicated deterioration of speechperception in noisy conditions among the elderly even those with normal hearing capabilities. The aim of this study was to investigate the effects of age on the speech-in-noise identificationby speech-in-noise (SIN) test, subjective ratings of hearing difficulties by speech,spatial, and qualities of hearing scale (SSQ) questionnaire and encoding of fundamental frequency(F0) by Speech auditory brainstem response (ABR) in the elderly and comparing theresults with young people. Subjects and Methods: The present study was conducted on32 elderly people aged over 60 years old (17 male and 15 female) with the mean age of68.9 (standard deviation=6.33) possessing normal peripheral hearing and 32 young subjects(16 male and 16 female) aged 18-25 years old. Results: Findings showed that thescore of SIN test is lower among the elderly people as compared with young people in signal-to-noise ratios of 0 and -10 based on Iranian version of SSQ questionnaire (p<0.001). The range of F0 amplitude in the elderly people is also lower than young people (p<0.001) inSpeech ABR. Conclusions: It seems that speech processing in older people is deterioratedcomparing with young people regardless of their normal peripheral auditory thresholds. Thisdecrease will result in weaker perception and improper segregation of speech from othercompeting sources.
Abstract
Numerous studies have indicated deterioration of speechperception in noisy conditions among the elderly even those with normal hearing capabilities. The aim of this study was to investigate the effects of age on the speech-in-noise identificationby speech-in-noise (SIN) test, subjective ratings of hearing difficulties by speech,spatial, and qualities of hearing scale (SSQ) questionnaire and encoding of fundamental frequency(F0) by Speech auditory brainstem response (ABR) in the elderly and comparing theresults with young people. Subjects and Methods: The present study was conducted on32 elderly people aged over 60 years old (17 male and 15 female) with the mean age of68.9 (standard deviation=6.33) possessing normal peripheral hearing and 32 young subjects(16 male and 16 female) aged 18-25 years old. Results: Findings showed that thescore of SIN test is lower among the elderly people as compared with young people in signal-to-noise ratios of 0 and -10 based on Iranian version of SSQ questionnaire (p<0.001). The range of F0 amplitude in the elderly people is also lower than young people (p<0.001) inSpeech ABR. Conclusions: It seems that speech processing in older people is deterioratedcomparing with young people regardless of their normal peripheral auditory thresholds. Thisdecrease will result in weaker perception and improper segregation of speech from othercompeting sources.
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