McMillan P M, Marchant C D, Shurin P A
Ann Otol Rhinol Laryngol. 1985 Mar-Apr;94(2 Pt 1):145-8. doi: 10.1177/000348948509400209.
Ipsilateral acoustic reflex thresholds were studied in otoscopically normal ears of infants 2 weeks to 12 months old. Probe tones of 220 and 660 Hz and pure tone activators were used. Reflex recordings were free of activator artifact and were measured using quantitative standards. Reflexes were detected in 85% to 95% of infant ears for 500, 1,000, and 2,000 Hz activators but were present in only 76% of ears at 4,000 Hz. Median thresholds of 80 to 85 dB hearing level were obtained with all activators and both probe tones. There were no differences in proportions of reflexes obtained with the two probe tones. With a 500-Hz activator, thresholds at 220 Hz were lower than those at 660 Hz, while no threshold differences were demonstrated between probe tones at other activators. No relationship was demonstrated between age in the first year of life and presence or threshold of reflexes. Ipsilateral acoustic reflex measures have potential use in the identification of hearing loss and middle ear disease in infancy.
对2周龄至12月龄婴儿耳镜检查正常的耳朵进行了同侧听觉反射阈值研究。使用了220和660赫兹的探测音以及纯音刺激源。反射记录无刺激源伪迹，并采用定量标准进行测量。对于500、1000和2000赫兹的刺激源，85%至95%的婴儿耳朵检测到反射，但在4000赫兹时仅76%的耳朵有反射。所有刺激源和两种探测音均获得了80至85分贝听力级的中位数阈值。两种探测音获得反射的比例没有差异。使用500赫兹刺激源时，220赫兹的阈值低于660赫兹，而其他刺激源的探测音之间未显示出阈值差异。在出生后第一年的年龄与反射的存在或阈值之间未显示出相关性。同侧听觉反射测量在婴儿期听力损失和中耳疾病的识别中有潜在用途。
