Use of stimulus-frequency otoacoustic emission latency and level to investigate cochlear mechanics in human ears.
Use of stimulus-frequency otoacoustic emission latency and level to investigate cochlear mechanics in human ears.
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DOI：
10.1121/1.2214147
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发表时间：
2006-08
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通讯作者：
K. Schairer;John C. Ellison;Denis F. Fitzpatrick;D. H. Keefe
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作者：
K. Schairer;John C. Ellison;Denis F. Fitzpatrick;D. H. Keefe
对16只听力正常成年人耳进行了刺激频率耳声发射（SFOAE）声压级（SPL）和潜伏期的测量。主要目标是使用SFOAE潜伏期估计来更好地理解可能的源机制，例如线性相干反射、非线性失真和通过耳蜗液的反向传输，以及这些源如何作为刺激水平的函数而变化。另一个目标是使用SFOAE激光无创估计耳蜗调谐。SFOAE占主导地位的反射源在低刺激水平，与以前的研究一致，但非线性失真或流体压缩成为主导源，即使在最高的刺激水平。在每个刺激水平下，SFOAE潜伏期是从1000到4000 Hz的近似恒定的周期数，与耳蜗缩放对称性一致。SFOAE潜伏期随刺激强度的增加而缩短，且与频率无关。调谐估计是恒定的1000赫兹以上，与同时掩蔽数据一致，但与以前的估计SFOAE。
Stimulus frequency otoacoustic emission (SFOAE) sound pressure level (SPL) and latency were measured at probe frequencies from 500 to 4000 Hz and probe levels from 40 to 70 dB SPL in 16 normal-hearing adult ears. The main goal was to use SFOAE latency estimates to better understand possible source mechanisms such as linear coherent reflection, nonlinear distortion, and reverse transmission via the cochlear fluid, and how those sources might change as a function of stimulus level. Another goal was to use SFOAE latencies to noninvasively estimate cochlear tuning. SFOAEs were dominated by the reflection source at low stimulus levels, consistent with previous research, but neither nonlinear distortion nor fluid compression become the dominant source even at the highest stimulus level. At each stimulus level, the SFOAE latency was an approximately constant number of periods from 1000 to 4000 Hz, consistent with cochlear scaling symmetry. SFOAE latency decreased with increasing stimulus level in an approximately frequency-independent manner. Tuning estimates were constant above 1000 Hz, consistent with simultaneous masking data, but in contrast to previous estimates from SFOAEs.