We investigated and analysed the actual conditions and characteristics of railroad noise levels for 17 sites in the vicinity of the Seoul-Pusan Line. The results are summarized. as follows : 1) Railroad noise level ranged to 64∼74 L_eq dB(A) at day time and ranged to 60∼72 L_eq dB(A) at night time. 2) Increased night noise level depend on the increase of trains passing at night time. 3) The major factor of increased noise level in the vicinity of stations are using loudspeakers and stream whistle on trains. 4) Decreased effect of noise according to distance is able to be described quantitatively using regression equations of multiplicative model. L_eq=78.59 X^-0.056 n=25, r=-0.994, s.e.=1.007 P_av =105.68X^-0073, n =25, r =-0.997, s.e. = 1.007 Also increased and decreased effect of noise according to floor in apartment is able to be described quantitatively using regression equations of multiplicative model. L_eq = 64.238 X^0.0567, n = 39, r = 0.787, s. e. = 1.004 P_av. = 79.963 X^0.0254 n = 39, r = 0.689, s. e. = 1.056 5) Average noise level in high floor is over 70L_eq dB(A) at day and night time, so more detailed soundproofing countermeasured in high floors apartment is required.

• 민경섭(대구광역시 보건환경연구원) | Kyung-Sub Min (Public Health and Environment Institute of Taegu City)
• 송희봉(대구광역시 보건환경연구원) | Hee-Bong Song (Public Health and Environment Institute of Taegu City)
• 박연준(대구광역시 보건환경연구원) | Yeun-Jun Park (Public Health and Environment Institute of Taegu City)
• 한개희(대구광역시 보건환경연구원) | Gae-Hee Han (Public Health and Environment Institute of Taegu City)
• 이명숙(대구광역시 보건환경연구원) | Myoung-Sook Lee (Public Health and Environment Institute of Taegu City)
• 김용혜(대구광역시 보건환경연구원) | Yong-Hae Kim (Public Health and Environment Institute of Taegu City)
• 홍성희(대구광역시 보건환경연구원) | Sung-Hee Hong (Public Health and Environment Institute of Taegu City)
• 권기홍(영남전문대학 환경공업과) | Gee-Hong Kwon (Dept. of Enviro. Industry, Yeungnam Junior College)