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Hearing Threshold Estimation Using the Post-Auricular Muscle Response (PAMR)
Audiology Program, School Of Health Sciences, Univ. Sains Malaysia
Rosninda Binti ABDULLAH, Rosninda Binti ABDULLAH
¸ñÀû: The study aimed to determine the correlation between PAMR thresholds and thresholds obtained by standard pure tone audiometry (PTA) in normally hearing and hearing-impaired group of subjects. ¹æ¹ý:A total of 55 subjects (20 normally hearing, 20 subjects with conductive hearing loss and 15 subjects with sensorineural hearing loss) were tested with PTA and underwent a series of ipsilateral and contralateral recording of tone-burst evoked PAMR at the stimulus rate of 11 per second across the frequency of 500, 1000 and 4000Hz, bilaterally. °á°ú:The PAMR threshold were found to be well correlated with the thresholds obtained by PTA at all frequency tested as shown by intra-class correlation coefficient value ranges from 0.62 to 0.92. The strongest correlation was seen in SNHL group, followed by CHL group and lastly in normally hearing subjects. The PAMR threshold found to be within 20 dB SL of the pure tone thresholds at 500Hz and within 5 to 10 dB SL at 1000 and 4000Hz. °á·Ð:With an optimize testing parameters, tone-burst PAMR could be used as an objective tool to estimates the hearing threshold level in individuals with normal hearing or hearing loss.


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