单频和多频刺激骨导听性稳态反应的比较

目的测试听力正常青年人单频及多频刺激骨导听性稳态反应(BC-ASSR)阈值,比较两者是否有差异。方法选取听力正常青年人28例(56耳),进行骨导ASSR及纯音听阈测试,记录0.5、1、2、4kHz单频刺激及多频刺激的BC-ASSR反应阈及纯音听阈,比较两种刺激方式所得结果。结果在0.5、1、2、4kHz频率单频刺激骨导的ASSR反应阈分别为53、47、53、51dB SPL,多频刺激骨导ASSR反应阈分别为59、54、63、61dB SPL,两者间有高度显著性差异(P<0.01),且高频处的差异相对较大。结论BC-ASSR测试时,单频刺激和多频刺激方法所得听阈值存在一定的差异,且高频处的差异相对较大,因而临床应用测试时宜采用单频刺激方式。

Auditory Steady-state Response to Single or Simultaneously Multiple Bone-conduction Stimuli in Adults with Normal Hearing

Objective To get the thresholds of single and simultaneously multiple bone conduction auditory steady-state response(BC-ASSR) of young adults with normal hearing,and to compare the thresholds obtained with the two methods.Methods BC-ASSR to single and simultaneously multiple stimuli and PTA were examined in 28(56 ears ) young adults with normal hearing.Results At 0.5,1,2,4 kHz,the thresholds of BC-ASSR to single stimuli were 53,47,53,51 dB SPL respectively;the thresholds of BC-ASSR to simultaneously multiple stimuli were 59,54,63,61 dB SPL respectively.There were significant differences between the two at each frequency. Conclusion There are some difference between the thresholds of ASSR to single and simultaneously multiple bone conduction stimuli,especially at the higher frequencies.