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Medical Journal of Islamic Republic of Iran، جلد ۳۰، شماره ۱، صفحات ۲۷۳-۲۷۹
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عنوان انگلیسی Effect of signal to noise ratio on the speech perception ability of older adults
چکیده انگلیسی مقاله Background: Speech perception ability depends on auditory and extra-auditory elements. The signal-to-noise ratio (SNR) is an extra-auditory element that has an effect on the ability to normally follow speech and maintain a conversation. Speech in noise perception difficulty is a common complaint of the elderly. In this study, the importance of SNR magnitude as an extra-auditory effect on speech perception in noise was examined in the elderly. Methods: The speech perception in noise test (SPIN) was conducted on 25 elderly participants who had bilateral low–mid frequency normal hearing thresholds at three SNRs in the presence of ipsilateral white noise. These participants were selected by available sampling method. Cognitive screening was done using the Persian Mini Mental State Examination (MMSE) test. Results: Independent T- test, ANNOVA and Pearson Correlation Index were used for statistical analysis. There was a significant difference in word discrimination scores at silence and at three SNRs in both ears (p≤0.047). Moreover, there was a significant difference in word discrimination scores for paired SNRs (0 and +5, 0 and +10, and +5 and +10 (p≤0.04)). No significant correlation was found between age and word recognition scores at silence and at three SNRs in both ears (p≥0.386). Conclusion: Our results revealed that decreasing the signal level and increasing the competing noise considerably reduced the speech perception ability in normal hearing at low–mid thresholds in the elderly. These results support the critical role of SNRs for speech perception ability in the elderly. Furthermore, our results revealed that normal hearing elderly participants required compensatory strategies to maintain normal speech perception in challenging acoustic situations.
کلیدواژه‌های انگلیسی مقاله Word Discrimination Score, Signal to Noise Ratio, Elderly.
نویسندگان مقاله الهه شجاعی | elahe shojaei
department of audiology, school of rehabilitation sciences, iran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

حسن عشایری | hassan ashayeri
department of basic sciences in rehabilitation, school of rehabilitation sciences, iran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

زهرا جعفری | zahra jafari
department of basic sciences in rehabilitation, school of rehabilitation sciences, iran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (Iran university of medical sciences)

محمدرضا زرین دست | mohammad reza zarrin dast
department of pharmacology, tehran university of medical sciences, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

کورش کمالی | koorosh kamali
department of public health, zanjan university of medical sciences, zanjan, iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی زنجان (Zanjan university of medical sciences)

نشانی اینترنتی http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-974&slc_lang=en&sid=en
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