Comparison of Manual and Automatic Evaluation of Speech Recognition Threshold Using Mandarin Disyllabic Test / 听力学及言语疾病杂志

ABSTRACT

Objective To compare the results of manually -tested speech recognition threshold (SRT ) with automatically software -recorded SRT in the trial of Mandarin disyllabic test ,exploring the significance to the clini-cal applying .Methods 128 normal people of different ages without hearing loss and 57 workers exposed to noise in an automobile manufacturing was selected .These two group of volunteers speak mainly Mandarin in their daily life . MADSEN Conera (Danmark) clinical audiometr was applied .A group of double syllable word list with the same dif-ficulty of equivalence was used as test material .The initial presentation level was 20 dB HL higher than PTA .Then compared the results of manually -tested SRT with automatically software -recorded SRT .Results In the normal group ,the automatic value SRT was 7 .84 ± 3 .98 dB HL ,the manual value was 9 .19 ± 4 .47 dB HL ,and the average value of speech frequency threshold was 7 .63 ± 5 .78 dB HL .In the noise group ,the automatic value SRT was 6 .10 ± 8 .40 dB HL ,the manual value was 18 .81 ± 9 .52 dB HL ,and the average value of language frequency threshold was 27 .18 ± 19 .13 dB HL .There was significant difference between the values of SRT tested manually and recorded automatically (P<0 .01) .Conclusion There are differences between SRT valued manually and automatically .The SRT in people with normal hearing can be tested using automatic -recorded method .This method is convenient for screening in people without hearing loss .To exam in people with hearing loss ,the manual test is more appropriate .