Stover L, Gorga M P, Neely S T, Montoya D
Boys Town National Research Hospital, Omaha, Nebraska 68131, USA.
J Acoust Soc Am. 1996 Aug;100(2 Pt 1):956-67. doi: 10.1121/1.416207.
This study examined the effect of primary stimulus level on the ability of distortion product otoacoustic emission (DPOAE) measurements to separate normal-hearing from hearing-impaired ears. Complete I/O functions were obtained for nine f2 frequencies on 210 people approximately evenly divided between normal hearing and hearing impaired. Clinical decision theory was used to assess both DPOAE amplitudes and DPOAE threshold as diagnostic indicators of hearing status. Moderate level primary stimuli elicited responses that separated normal from impaired better than either lower level or higher level stimuli. The two populations were differentiated for all frequencies above 500 Hz by DPOAE amplitude, given primary levels, L1 and L2, of 65 and 55 dB SPL. DPOAE threshold performed equally well, but threshold ambiguity in noise and longer testing times make it a less suitable DPOAE measure to use diagnostically.
本研究探讨了初级刺激水平对畸变产物耳声发射（DPOAE）测量将听力正常者与听力受损者区分开来的能力的影响。对210人在9个f2频率上获得了完整的输入/输出函数，这些人在听力正常和听力受损者之间大致平均分配。临床决策理论被用于评估DPOAE幅值和DPOAE阈值作为听力状态的诊断指标。中等水平的初级刺激所引发的反应在区分正常与受损方面比低水平或高水平刺激都更好。在初级水平L1和L2分别为65 dB SPL和55 dB SPL的情况下，对于所有高于500 Hz的频率，通过DPOAE幅值可区分这两个人群。DPOAE阈值的表现同样良好，但噪声中的阈值模糊性以及更长的测试时间使其作为诊断用的DPOAE测量方法不太合适。
