查詢結果分析
來源資料
相關文獻
- 噪音對人體聽覺影響之實驗研究
- 噪音對人體生理影響之實驗研究(3):3組年齡群的呼吸、心跳及血壓反應之實驗
- 噪音對人體生理影響之實驗研究(2):3 組不同年齡群噪音性短暫性聽力損失之實驗
- 噪音對人體生理影響之實驗研究(1):正常聽力青年之實驗
- 多變量噪音作業環境所引起之聽覺性效應評估
- 不同噪音強度所引起之非聽覺性效應受共存因子之影響
- 單測睪丸受傷後對他側睪丸之影響實驗研究
- 迴響室內低頻噪音對人體影響之研究
- Analysis of Independent Component Analysis in Frequency-Domain on Cochlear Implant
- 由美國法探討胚胎幹細胞之研究--以NIH之HSC準則及專利法制為中心
頁籤選單縮合
題 名 | 噪音對人體聽覺影響之實驗研究=An Experimental Study of Human Auditory Effect of Noise |
---|---|
作 者 | 王老得; | 書刊名 | 師大學報 |
卷 期 | 28 1983.06[民72.06] |
頁 次 | 頁1-17 |
分類號 | 416.812 |
關鍵詞 | 人體; 研究; 實驗; 影響; 噪音; 聽覺; |
語 文 | 中文(Chinese) |
英文摘要 | An experimental study on the noise-induced hearing loss or noise-induced temporary threshold shift (NITTS) of the normal hearing college students (30 male and 30 female) was performed with three kinds of narrow band noise, including 250Hz, 1 KHz and 4KHz octave bands, and six different sound pressure levels of broad band noise, which were used white noise at sound pressure levels of 65, 70, 75, 80, 85 and 90 dB as stimulating tones. The mean age of this study subjects was 21.28 years in male group and 21.8 years in female group. First of all, all subject were measured with their hearing levels by using Rion AA39 audiometer, and then the persons with less 15 dB in average hearing level of speech range (500Hz, 1KHz, and 2KHz) were selected as the normal hearing subjects. The actual mean values were 9.55 dB in male group and 9.83 dB in female group. Two minutes after exposure to each stimulating noise ceased, the subject was retested with the hearing levels on 4KHz and 6KHz, and then compared with that of preexposure to the stimulating noise. If the difference of value between pre-and post-exposure hearing level on 4KHz or 6KHz shows 5 dB or greater, it is defined as a positive response of NITTS. The inciaence of positive TTS2 shows 65% among 60 subjects after 50 seconds of exposure to the broad band noise; and 3.3%, 16.7%, 30% after 50 seconds of exposure at 70 dB SPL to the 250Hz, 1KHz, 4KHz octave-band noises respectively. According to Reed-Muench bioassay method, LD50 value shows 80.99 dB SPL for the white noise exposure, In other words, 50% of subjects in this study group reveals positive TTS2 after exposure for 50 seconds to white noise at 80.99 dB sound pressure level. So the 81 dB SPL of the white noise may be referred to as the risk-criterion limit of "Noise Control Administration in Taiwan" for the broad band noise. If the environmental noise contains the 4KHz or higher pure-tone components and/or high octave bands, the risk-criterion limit must be decreased reasonably for the purpose of preventing noise-induced permanent threshold shift (NIPTS). |
本系統中英文摘要資訊取自各篇刊載內容。