Comparative influence of repeated measurement and of attention on evoked otoacoustic emissions.
Comparative influence of repeated measurement and of attention on evoked otoacoustic emissions.
复制标题
重复测量和注意力对诱发耳声发射的比较影响。
作者：
C. Meric;L. Collet
本研究采用诱发性耳声发射（EOAEs）比较了听觉注意任务和重复测量对外周听觉系统的影响。实验任务协议包括三个阶段（前控制，注意力和后控制条件），在每个阶段中，以约60秒的间隔进行6次EOAE测量，而另一只耳朵接收2，500和750 Hz的两个纯音，出现概率分别为20%和80%。在对侧注意条件下，受试者必须计算频率较低的高音的数量。使用长持续时间方案（整个实验为20 min），以检查对EOAE的可能时间效应。观察到第二次和第三次治疗期间EOAE振幅增加，最后一次测量时出现线性饱和。虽然无法确定注意力效应，但似乎存在时间效应。重复测量对EOAE的影响的可能解释进行了讨论。此外，EOAE振幅的受试者进行了比较，出现自发性耳声发射的受试者和那些没有SOAE的受试者：发现显着差异，显示耳蜗发射SOAE的特殊性。
This study compared the influence of an auditory attention task and of repetitive measures on the peripheral auditory system, using evoked otoacoustic emissions (EOAEs). The experimental task protocol comprised three sessions (pre-control, attention and post-control conditions) with, in each session, six measurements of EOAEs, at intervals of about 60 seconds, while the other ear was receiving two pure tones of 2,500 and 750 Hz, with a probability of appearance of 20% and 80%, respectively. In the contralateral attention condition, the subject had to count the number of the less frequent high pitched sounds. A long duration protocol (20 min for the total experiment) was used in order to examine a possible time-effect on EOAEs. An increase in EOAE amplitude during the second and third sessions, with linear saturation around the last measurements, was observed. While no attention effect could be identified, a time-effect seemed to be present. Possible explanations for the influence of repeated measurements on EOAEs are discussed. Moreover, EOAE amplitudes of subjects presenting spontaneous otoacoustic emissions were compared to those of subjects without SOAEs: significant differences were found, showing the particularity of cochleas emitting SOAEs.