소음성 난청에서 이명의 주파수와 작업장 소음 주파수의 관계 = Frequencies of Tinnitus and Noise of the Factory in Noise-induced Hearing Loss

다국어 초록 (Multilingual Abstract)

Background and Objectives：This study was designed to evaluate relation betwen frequencies of noise and tinnitus in noise-induced hearing los and to elucidate mechanism of tinnitus in noise-induced hearing los. Materials and Methods：Four factories were selected, of which noise frequencies were diferent except one factory. Preliminary screning hearing test with a pure tone audiometer on 1000 and 4000 Hz was done. And if the hearing threshold was over 40 dB, history taking, otolo-gical examination, tympanometry, pure tone audiometry on 500, 1000, 2000, 4000, 6000 Hz were done. Noise was measured in 125, 250, 500, 1000, 2000, 4000, 8000 Hz. Tinitus was measured using 1000, 2000, 4000 Hz pure tone. Results：1) Hear-ing los was most severe in the 4000, 6000 Hz range. 2) In A factory, noise was most intense on 4000 Hz, in B factory on 2000 Hz, and in C and D factory on 1000 Hz. 3) Forty-three workers (42.2%) of total 102 subjects complained tinnitus. And frequency of tinnitus was 4000 Hz in 71 ears (89.9%) among 79 ears with tinnius. Conclusion：Regardles of the frequency -induced hearing los.

국문 초록 (Abstract)

소음성 난청에 동반된 이명과 작업장 소음 주파수와의 관계를 조사하고 이를 토대로 소음성 난청에 동반된 이명의 병리기전을 알고자 소음작업장 4군데에서 1년 이상 근무한 102명을 대상으로 청력 및 이명 검사를 실시하였다. 작업장 근로자를 대상으로 10 Hz와 40 Hz의 순음청력검사로 선별검사를 시행하고 병력청취, 임피던스 검사, 500, 1000, 2000, 4000, 6000 Hz의 순음청력검사를 실시하였다. 그리고, 이명은 pitch-match 법으로 주파수를 조사하였다. 네 군데의 작업장에서 소음의 강도 및 주파수를 측정한 결과 10 Hz의 소음이 가장 심한 곳이 2군데, 20 Hz가 1군데, 40 Hz가 1군데이었다. 소음성 난청환자의 42.2%에서 이명이 동반되었으며, 이명의 주파수는 소음의 주파수와 관계없이 소음성 난청에서 청력손실이 가장 심한 4000 Hz이었다. 이는 앞으로 연구가 더 필요할 것으로 생각되나 소음성 난청에 동반한 이명이 소음에 의해서 손상된 외유모세포에서 유래할 수 있음을 시사한다.

참고문헌 (Reference)

1 Axelsson A, "The effect of impulse on cochlear vessels" 111-5,

2 Lee JD, "Studies on occupational deafness" 265-77,

3 Furrer W, "Special kind of acoustic trauma of the cochlea from ear surgery" 479-86, laryngoscope1960;70

4 Konno M, "Some aspects of the biochemistry of acoustic trauma" 661-97,

5 Goh EK, "Residual inhibition of tinnitus after masking with various sounds" 657-70, koreanjotolarygol1990;33

6 Lim HH, "Pathophysiology of tinnitus" jungang moonhwa co 3-10, ;2000

7 Martin GK, "Noise-induced hearing loss. In: Cummings CW, Fredrickson JM, Harker LA, Krause CJ, Richardson MA, Schuller DE, editors" Mosby Year Book;1998 3153-71, 1998

8 Yoon SM, "Mechanism and treatment of noise induced hearing loss" 467-73,

9 Kim HJ, "Korean Society of Otolaryngology" ilchokak; 690-7, 2002

10 Borg E, "Effect of the acoustic reflex on inner ear damage induced by industrial noise" 361-9, actaotolaryngol1983;96

11 Shaddock LC, "Effect of high intensity impulse noise on the vascular system of chinchilla cochlea" 87-92,

12 Sha S, "Defferential vulnerability of basal andapical hair cells is based on intrinsic susceptibility to free radicals" 42-3, 2000

13 Carson SS, "Combined effects of aspirin and noise in causing permanent hearing loss" 1070-5,

14 Chon KM, "Audiological study on the hearing acuity of noise industrial worker" 11-22, jbusanmedassoc1980;16

15 Kim BH, "Audiological studies on noise deafness" 305-13, koreanjotolaryngol1974;17

16 Davis JL, "Anatomic correlation of noise induced hearing loss" 493-9,

17 Lim DJ, "Anatomic correlates of noise induced hearingloss" 493-513,

18 Beagley HA, "Acoustic trauma in the guinea pig Electronmicroscopy including the morphology of cell junctions in theorgan of corti" 479-95, actaotolaryngol1965;60

19 Lee HY, "A clinical audiological survey of noise-induced hearing loss" 21-31, koreanjotolaryngol1971;4