Kalluri Radha, Abdala Carolina
House Research Institute, Department of Communication and Auditory Neuroscience, 2100 West Third Street, Los Angeles, California 90057
J Acoust Soc Am. 2015 Jan;137(1):EL78-84. doi: 10.1121/1.4903915.
This study presents the first reported measurements of stimulus frequency emissions (SFOAEs) in 15 human newborns and compares their magnitudes and phase-gradient delays to those reported in adults. SFOAEs in newborns were measured at stimulus levels as low as 15 dB sound pressure level (SPL). Responses were compared between adults and newborns at stimulus levels where SFOAEs in both age groups demonstrated approximately linear growth (<40 dB SPL for newborns, <25 dB SPL for adults). Neonates had adult-like SFOAE delays when compared in this fashion, which compensates for newborn middle ear inefficiencies.
本研究首次报告了对15名人类新生儿刺激频率耳声发射(SFOAE)的测量,并将其幅度和相位梯度延迟与成年人的相关数据进行了比较。新生儿的SFOAE是在低至15分贝声压级(SPL)的刺激水平下测量的。在两个年龄组的SFOAE均呈现近似线性增长的刺激水平下(新生儿<40分贝SPL,成年人<25分贝SPL),对成年人和新生儿的反应进行了比较。以这种方式比较时,新生儿具有与成年人相似的SFOAE延迟,这补偿了新生儿中耳的低效性。