Hutchings M E, Meyer S E, Moore D R
Laboratory of Physiology, Oxford University, UK.
Hear Res. 1992 Nov;63(1-2):71-8. doi: 10.1016/0378-5955(92)90075-x.
The binaural masking level difference (MLD) was measured in two groups of infants (aged 7-10 months) who either had or did not have a documented history of otitis media with effusion (OME). Subjects were trained to detect a 500 Hz signal (either in or out-of-phase between the ears) against an in-phase, narrow band noise masker centred at 500 Hz. Non-OME infants had elevated masked thresholds and reduced MLDs compared with normal-hearing older (7-12 years) children and adults (20-27 years). OME infants also had elevated masked thresholds and reduced MLDs but, in contrast to studies using older subjects, their results were similar to those of the non-OME infants. These results suggest that, during at least the first year of life, infants are disadvantaged compared with adults or children when listening in noisy environments. They also suggest that OME does not further compromise infants' ability to detect sounds in those environments.
在两组7至10个月大的婴儿中测量了双耳掩蔽级差（MLD），这两组婴儿分别有或没有中耳积液（OME）的记录病史。训练受试者在以500Hz为中心的同相窄带噪声掩蔽器的背景下，检测500Hz的信号（双耳之间同相或异相）。与听力正常的较大儿童（7至12岁）和成年人（20至27岁）相比，非OME婴儿的掩蔽阈值升高，MLD降低。OME婴儿的掩蔽阈值也升高，MLD降低，但与使用较大受试者的研究不同，他们的结果与非OME婴儿相似。这些结果表明，至少在生命的第一年，婴儿在嘈杂环境中聆听时比成年人或儿童处于劣势。它们还表明，OME不会进一步损害婴儿在这些环境中检测声音的能力。
