Medical Journal of the Islamic Republic Of Iran
مجله پزشکی جمهوری اسلامی ایران
Med J Islam Repub Iran
Medical Sciences
http://mjiri.iums.ac.ir
2
journal2
1016-1430
2251-6840
8
10.18869/mjiri
14
8888
13
en
jalali
1392
8
1
gregorian
2013
11
1
27
4
online
1
fulltext
en
Effects of ageing on speed and temporal resolution of speech stimuli in older adults
Rehabilitation
Rehabilitation
Original Research
Original Research
<font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0in 0in 10pt text-align: justify text-justify: inter-ideograph"><font face="Calibri"><font size="3"><b>Background:</b>
According to previous studies, most of the speech recognition disorders in
older adults are the results of deficits in audibility and auditory temporal
resolution. In this paper, the effect of ageing on timecompressed speech and
auditory temporal resolution by word recognition in continuous and interrupted
noise was studied.<o:p /></font></font></p><font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0in 0in 10pt text-align: justify text-justify: inter-ideograph"><font face="Calibri"><font size="3"><b>Methods:</b>
A time-compressed speech test (TCST) was conducted on 30 young and 32 older
adults with normal hearing thresholds. Lists of monosyllabic words were used at
three time compression ratios. Auditory temporal resolution was determined by
measuring the monosyllabic word recognition score (WRS), in the presence of continuous
and interrupted noise, at three signal-to-noise ratios (S/Ns).<o:p /></font></font></p><font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0in 0in 10pt text-align: justify text-justify: inter-ideograph"><font face="Calibri"><font size="3"><b>Results:</b>
There was a significant difference in TCST scores at the three compression
ratios within and between young and older adult groups (p< 0.001). Similar
results were obtained in WRSs at the three S/Ns in the presence of interrupted
and continuous noise (p< 0.001), and in the degree of auditory temporal
resolution (p=0.007). A significant correlation was found between the level of
test difficulty of TCST with WRSs in both young (r = 0.549, P=0.002) and older
adults (r= 0.531, P=0.003).<o:p /></font></font></p><font face="Times New Roman" size="3"> </font><p class="MsoNormal" style="margin: 0in 0in 10pt text-align: justify text-justify: inter-ideograph"><font size="3"><font face="Calibri"><b>Conclusion:</b>
Our results showed that ageing remarkably affects the processing of fast speech
stimuli and temporal resolving ability. These results are more supportive of
the effect of ageing on speech perception than on loss of hearing.<o:p /></font></font></p><font face="Times New Roman" size="3"> </font>
Ageing, Time-compressed speech, Word recognition score, Auditory temporal resolution, Interrupted noise, Continuous noise.
195
203
http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-596&slc_lang=en&sid=1
Zahra
Jafari
jafari.@iums.ac.ir
20031947532846008997
20031947532846008997
Yes
Rehabilitation Research Center (RRC), Department of Basic Sciencesin Rehabilitation, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Shaghayegh
Omidvar
shomidvar.audio@gmail.com
20031947532846008998
20031947532846008998
No
Rehabilitation Research Center, Department of Audiology, School ofRehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
Fateme
Jafarloo
fateme.jafarloo@yahoo.com
20031947532846008999
20031947532846008999
No
Rehabilitation Research Center, Department of Audiology, School ofRehabilitation, Tehran University of Medical Sciences, Tehran, Iran.