騷音性難聽에 對한 聽覺學的 考察 = Audiological Evaluation of Noise Induced Hearing Loss

다국어 초록 (Multilingual Abstract)

Audiological evaluation was performed for 184 female weavers(351 ears), who were 18~25 years old and have been working under the exposure of 103~105 dBa of machinery noise With the duration of employment they were divided into five groups under 1 year, 1~2 years, 2~3 years, 3~4 years and over 4 years
The following results were obtained,
1) Theindcience of noise induced hearing losswas 39.7%(36.2% of ears) and rapidly increased during first 1~2 years
2) The average maximum hearing loss on the pure tone audiograms appeared at 4,000 ㎐ with about 40 ㏈ of hearing level The average hearing level at high frequencies (3,000 ㎐-8,000 ㎐) showed below 25 ㏈ of hearing level in all groups and had the tendency to increase slightly with the duration of working, but themost of hearing losses developed during first one year except at 8,000 ㎐
3) The average hearing levelat speech frequencies was within normal range but the cases of hearing level over 25 ㏈ at 2,000 ㎐ was 27.%
4) The cases with maximum hearing loss at 4,000 ㎐ were 72.7% but the cases of maximumhearing loss at the other frequencies (3,000 ㎐, 6,000 ㎐ and 8,000 ㎐) were also observed and they increased slightly in numbers with the duration of working
The noise induced hearing loss under the exposure of 103~105 dBA for 5 years, seemed to develope during first 1~2yars and there after slightly increase hearing loss was showed but no edarkable changes weer observed rem.

목차 (Table of Contents)

• Ⅰ. 緖論
• Ⅱ. 硏究對象 및 方法
• Ⅲ. 硏究成績
• 1. 騷音性難聽의 發生頻度
• 2. 勤務年數와 純音聽力 ?値
• 3. 最高聽力損失을 갖인 周波數
• Ⅳ. 考察
• Ⅴ. 結論
• 參考文獻
• SUMMARY