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:: Volume 15, Issue 2 (5 2006) ::
aud 2006, 15(2): 1-9 Back to browse issues page
A comparison study on the time –frequency specifity of normal cochlear in infants and adults
Saeed Sarogh Farahani 1, Ghasem Mohammad Khani, Mahdieh Hasanalifard, Yousef Salimpour
Abstract:   (7921 Views)

Background and Aim: Analysis of transient evoked otoacoustic emissions(TEOAEs) is of considerable interest due to their close relation with cochlear mechanisms which reveal cochlear function.The particular structure of TEOAEs requires a method with both a satisfactory time and frequency resolution. Among different methods the time –frequency techniques are the most suitable approaches. The aim of this study was to investigate the differences between neonate’s cochlear function and adult’s cochlear function using time –frequency approaches in TEOAEs.

Materials and Method: The data of this cohort study was obtained from a sample of 23 normal neonates, aged between 1-28 days, and 31 normal adults, aged between 18 -25 years.TEOAEs with click stimulus were performed for both ears .The TEOAEs files were investigated in time – frequency transform software in off-line mode. The signal to noise ratio(SNR) and response level (dB) of TEOAEs were analysed.

Results: The reproducibility, SNR and response level in neonates was greater than adults and in both groups there were no significant difference between responses of males and females and of the right and the left ears.

Concolusion: There are differences between neonate’s and adult’s cochlear response. High frequencies responses are stronger in neonate’s cochlea.

Keywords: cochlear time- frequency specificity, time-frequency techniques
Full-Text [PDF 468 kb]   (1727 Downloads)    
Type of Study: Research |
Received: 2006/09/15 | Accepted: 2006/11/11 | Published: 2013/10/9
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Volume 15, Issue 2 (5 2006) Back to browse issues page
شنوایی شناسی - دانشگاه علوم پزشکی تهران Bimonthly Audiology - Tehran University of Medical Sciences
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