Exploiting Dual Otoacoustic Emission Sources.
Exploiting Dual Otoacoustic Emission Sources.
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DOI：
10.1063/1.4939413
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
C. Abdala;Radha Kalluri
中科院分区：
文献类型：
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作者：
C. Abdala;Radha Kalluri
两种不同的过程产生耳声发射（OAE）。反射源发射，在这里记录为刺激频率OAE，在低声级下提供最佳信息，对轻微听力损失更敏感;它们与耳蜗放大器增益和调谐有关。失真源发射在中高声级下最强，尽管有轻度听力损失，但仍持续存在;它们可能起源于毛细胞转导的非线性过程。在这项初步研究中，我们利用各自的独特功能，在正常听力和听力受损的耳朵产生一个组合的反射失真OAE配置文件。失真产品（DP）和刺激频率（SF）OAE记录在广泛的刺激水平和频率。在每只耳朵中生成两种发射类型的个体I/O和传递函数，并计算OAE峰值强度、压缩阈值和压缩率。这些结合SFOAE和DPOAE功能在正常和听力受损的耳朵可能提供一个潜在的信息和新的听力损失的指标。这是利用OAE源表征耳蜗功能和功能障碍的第一步。
Two distinct processes generate otoacoustic emissions (OAEs). Reflection-source emissions, here recorded as stimulus frequency OAEs, are optimally informative at low sound levels and are more sensitive to slight hearing loss; they have been linked to cochlear amplifier gain and tuning. Distortion-source emissions are strongest at moderate-high sound levels and persist despite mild hearing loss; they likely originate in the nonlinear process of hair cell transduction. In this preliminary study, we exploit the unique features of each by generating a combined reflection-distortion OAE profile in normal hearing and hearing-impaired ears. Distortion-product (DP) and stimulus-frequency (SF) OAEs were recorded over a broad range of stimulus levels and frequencies. Individual I/O and transfer functions were generated for both emission types in each ear, and OAE peak strength, compression threshold, and rate of compression were calculated. These combined SFOAE and DPOAE features in normal and hearing-impaired ears may provide a potentially informative and novel index of hearing loss. This is an initial step toward utilizing OAE source in characterizing cochlear function and dysfunction.