使用两种流行探头记录的人类新生儿畸变产物耳声发射相位的差异。
Differences in distortion product otoacoustic emission phase recorded from human neonates using two popular probes.
机构信息
Division of Communication and Auditory Neuroscience, House Ear Institute, 2100 W Third Street, Los Angeles, California 90057, USA.
出版信息
J Acoust Soc Am. 2010 Jul;128(1):EL49-55. doi: 10.1121/1.3453415.
Abstract
DPOAE (2f(1)-f(2)) phase was measured across a 3-octave frequency range from two groups of newborns using ER10B+ and ER10C probe microphones. A marked phase shift was noted in the mid-to-high frequency range for newborn data recorded with the ER10C only. In contrast, the ER10B+ produced phase that was approximately invariant as a function of frequency for most of the range. Probe-related phase shifts can be effectively eliminated by correcting for variations in the phases of the primary tones. Results highlight the importance of detecting and correcting for system-related phase shifts so they are not misinterpreted as cochlear in origin.
摘要
使用 ER10B+和 ER10C 探测麦克风，在 3 个倍频程频率范围内测量了新生儿的 2f(1)-f(2) 耳声发射（DPOAE）相位。仅使用 ER10C 记录的新生儿数据在中高频范围内出现明显的相位偏移。相比之下，ER10B+ 产生的相位在大多数频率范围内几乎随频率变化而不变。通过校正主频的相位变化，可以有效地消除探头相关的相位偏移。结果突出了检测和校正系统相关相位偏移的重要性，以免将其误解为源于耳蜗。
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