Acoustic analysis of auditory environment in nursery room.

在欧洲和其他国家，听觉环境在婴儿期的健康成长中起着重要作用，这一点已经被认识了很长一段时间。然而，日本目前对日托中心和幼儿园托儿所的标准规定了每个儿童的面积标准和听觉标准，本研究的目的是通过调查幼儿与幼儿园和幼儿园教师在托儿所内的活动，以及进行听力测试，为了说明日本的托儿所有一个适合儿童及其照顾者活动的听觉环境，对教师进行了测试。结果如下。作为一个例子，使用听力计和OAE筛选器测量教师的听力阈值的结果显示，在育儿后立即明显看到听觉损失的增加，这表明“噪音”对听力的影响。在吸声过程到位的育儿室工作后，没有看到可听度下降的趋势。上述结果表明，对幼儿长期生活的教室内的听觉环境进行测量，可以作为了解幼儿和教师对噪声耐受性的一条线索，教师听力测试可以作为评价教室内听觉环境的一种方法。

It has been recognized in Europe and the other countries for quite some time now that the auditory environment plays an important role in the healthy growth of children during infancy. However current Japanese standards for nursery rooms in day-care centers and kindergartens indicate area standards per child and for auditory standards, only sounds such as the level of external traffic noise are indicated.This study aims to develop proper evaluation standards for the auditory environment of nursery rooms by investigating the activities of children with their nursery and kindergarten teachers inside nursery rooms as well as conducting audiometric tests of the teachers in order to clarify that nursery rooms in Japan have an auditory environment suitable to support the activities of children and their care takers.The results are as follows. As one of the examples, the results of the audiometric threshold value of the teachers measured using audiometers and OAE screener showed that an increase in auditory loss was clearly seen right after childcare, indicating the impacts of “noises" on audibility. After working in nursery rooms where the sound absorption process was in place, no tendency for a decrease in audibility was seen. The results above revealed that measuring the auditory environment inside nursery rooms where children spend long periods of time everyday can be a clue to understanding the amountof noise that children and teachers are exposed to and audiometric testing for teachers can be used as amethod to evaluate the auditory environment inside nursery rooms.