Noise analysis and intervention in speech school environment: regular private and public schools

Purpose : the aim of this study is to measure noise levels during the school year in two classrooms in a grade of elementary school, a private schools one and a public school another, in both case frequented by deaf students cochlear implant users, to analyze whether noise levels are consistent with the standard Brazilian NBR 10152 of ABNT (1990) and school staff to discuss strategies to minimize the impact of noise on learning of deaf students.Methods : we performed eight measurements of noise level, using a dosimeter, model 1444, in each classroom, in a private and public schools. At the same time the measurements were conducted with monthly meetings with teachers from both schools.Results : we found that levels of noise present in the public ranged from 74.3 to 79 dB (A) and in the private noise levels ranged between 76.1 and 80.9 dB (A). In each of these schools were made 8 meetings.Conclusion : after observations we found high levels of noise in the school environment, and there were no statistical differences between both networks. Referring to monthly meetings it was clear that educators have adopted strategies to help communication within the school environment. It´s clearly the need to acquire technological resource accessibility for deaf students who use oral communication, the system of modulated frequency.

## 研究目的
本研究旨在对两所小学班级（分别为私立学校与公立学校）的学年时段噪声水平进行测量，两所教室的使用者均为使用人工耳蜗植入体（cochlear implant）的听障学生；同时分析噪声水平是否符合巴西国家标准化协会（ABNT）1990年发布的巴西国家标准NBR 10152，并联合学校教职工探讨降低噪声对听障学生学习影响的相关策略。

## 研究方法
本研究针对私立与公立学校的两间教室，分别使用型号为1444的噪声剂量计开展8次噪声水平测量；测量开展期间，同步组织两所学校的教师召开月度座谈会。

## 研究结果
本研究测得公立学校教室内的噪声水平介于74.3~79 dB(A)，私立学校教室内的噪声水平则介于76.1~80.9 dB(A)。两所学校各召开了8次月度座谈会。

## 研究结论
经观测发现，两所学校的校园环境均存在较高噪声水平，且两者的办学体系间噪声水平无统计学差异。从月度座谈会的反馈来看，教职工已采取相关策略以优化校园内的沟通交流。显而易见，对于使用口语沟通的听障学生而言，亟需配备调幅频率系统这类技术可及性资源。