作業者の聴力損失(PTS)の測定ならびにPTSと言語聴力障害との関連

工人听力损失（PTS）的测量以及PTS与言语听力障碍之间的关系

• 批准号: 62480177
• 负责人: YAMAMOTO Takeo
• 金额: $ 3.46万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62480177/
• 关键词: NIPTS; Industrial noise; Industrial hygiene; Speech perception; 許容基準

This study investigates the permanent threshold shift(PTS) of workers induced by industrial noise exposure and the relation between PTS and the impairment of speech perception. The results of the investigations and the experiments are as follows;1. Hearing thresholds of 510 noise-exposed workers and 325 subjects without noise exposure are measured. 2. Noise exposure of each worker is measured by means of indivifual noise dose meter which gives equivalent continuous A-Weighted Sound Pressure Level over the particular averaging time. 3. Articulations of monosyllabic words using the subjects having noise-induced PTS as well as normal subjects are measured. It is found that speech hearing test using monosyllabic words is not sensitive to hearing impairment. 4. Articulations of trisllabic words using the hearing impaired and normal subjects having NIPTS are measured in the presence of ambient noise and in the condition of reverberation. The results show that the hearing impaired are more imfluenced by reverberation in speech perception. 5. Digital filter simulating the recruitment phenomenon is programmed and distroted vocal sounds presumed the hearing impaired might hear are synthesized. 6. Articulations of monosyllabic sounds synthesized as above are measured using normal subjects and the result expressed as speech audiogramme are compared with that of the fearing impaired using notdistorted vocal sounds. The result shows that both audiogrammes are in satisfactory agreement.

本研究探讨了工业噪声暴露引起的工人永久性阈值漂移(PTS)及其与言语知觉损害的关系。调查和实验结果如下：1.对510名噪声作业人员和325名非噪声作业人员进行了听力测试。2.每个工人的噪声暴露量是用个人噪声剂量计测量的，它在特定的平均时间内给出等效的连续A加权声压级。3.对噪声性PTS受试者和正常受试者的单音节单词发音进行了测量。研究发现，单音节言语听力测试对听力损伤不敏感。4.在环境噪声存在和混响条件下，对听力障碍者和正常听障被试的三字词发音进行了测量。结果表明，听觉障碍者言语知觉受混响的影响较大。5.编写了模拟招募现象的数字滤波程序，合成了假设听障人士可能听到的失真声音。6.使用正常受试者测量上述合成的单音节声音的发音，并将以言语听觉图表示的结果与使用未失真声音的恐惧症患者的发音结果进行比较。结果表明，两种听力图具有令人满意的一致性。

项目成果

加藤高志;平松幸三;高木興一;山本剛夫: 産業医学. 29. (1983)

加藤隆；平松幸三；山本武雄：工业医学。