Objective To explore the prediction of hearing thresholds in normal-hearing adults using multiple auditory steady- state response (MASSR) and tone-pip evoked auditory brainstem response(Tp-ABR).Methods The response thresholds of MASSR and the behavioral thresholds were recorded from 28 normal hearing adults(56ears) at 0.5,1,2,and 4kHz. The response thresholds of Tp-ABR, the latency and the interpeak lantency of wave â… , â…¢,â…£ and the behavioral thresholds of Tp-ABR, were recorded from 28 normal hearing adults(56ears) at 0.5,1,2, and 4kHz.The results were performed using statistical analysis software(SPSS11.5).Results â‘ There were no significant differences between the right and the left ear for the response thresholds(P>0.05). There were significant difference at 0.5kHz for MASSR (P<0.001) , at other three frequentcies, no siginificant differences(P>0.05). Pearson correlations between the response thresholds and the behavioral thresholds were 0.71,0.83,0.86,0.87,with averages between the response thresholds and the behavioral thresholds were 13.9±5.8,10.3±4.7,10.2±3.9,8.1±4.5dB SPL for carrier frequencies 0.5, 1, 2, and 4kHz. â‘¡There were significant difference at 0.5kHz for Tp-ABR (P<0.001) , at other three frequentcies, no siginificant differences(P>0.05). At 0.5, 1, 2, and 4kHz, peaison correlations between the response thresholds of Tp-ABR and the behavioral thresholds were 0.63,0.75, 0.88, 0.74,with average differences between the response threshold of Tp-ABR and the behavioral thresholds were 23.8±5.8,20.1±6.6,14.6±4.1,15.6±5.2dB. The differences between the response threshold of Tp-ABR and the behavioral threshold of Tp-ABR were 20.0±5.1,17.1±5.5,13.8±4.9,13.6±4.1dB nHL at 0.5,1,2, and 4kHz.The latency and the inteipeak lantency shortened with increasing of frequencies from 0.5 to 4 kHz,â‘¢There were significant difference at 0.5kHz for MASSR and Tp-ABR (P<0.001) , at other three frequentcies, no siginificant differences(P>0.05). At 0.5,1, 2, and 4kHz, pearson correlations between the response thresholds of MASSR and Tp-ABR were 0.69 ,0.85,0.87,0.81,with the response thresholds of MASSR and Tp-ABR were 34.6±7.9,24.2±7.6,25.5±7.5,26.7±7.9 dB SPL; 31.0±7.8,26.3±8.7,22.1±7.5,21.3±7.1 dB nHL at 0.5, 1, 2 and 4kHz. Between click-ABR thresholds and MASSR thresholdsaveraged at 0.5,1, 2 and 4kHz;at 1, 2 and 4kHz and at 2 and 4kHz, pearson correlation coefficients were 0.71,0.76,0.85,respectively. Between click-ABR thresholds and Tp-ABR thresholds averaged at 0.5, 1, 2 and 4kHz;at 1, 2 and 4kHz and at 2 and 4kHz, pearson correlation coefficients were 0.67,0.72,0.88,respectively.Corelation values were significant(r=0.88) at 2 and 4kHz.Conclusion This study illustrate that MASSR, Tp-ABR and PTA were highly correlated each other,especially at 1, 2, and 4kHz.There results support the use of MASSR as an alternative to Tp-ABR for thresholds assessment in normal-hearing adults. There were some advantages and caveats between MASSR and Tp-ABR.We should use MASSR with Tp-ABR to predict hearing thresholds.
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