• Title/Summary/Keyword: 복합 소음

Search Result 379, Processing Time 0.026 seconds

A Combined Rating System for Multiple Noises in Residential Buildings (공동주택 복합 생활소음의 통합 평가등급)

  • Ryu, Jong-Kwan;Jeon, Jin-Yong
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.16 no.10 s.115
    • /
    • pp.1005-1013
    • /
    • 2006

  • A survey and auditory experiment on multiple residential noises such as floor impact, airborne, bathroom, drainage and traffic noises were conducted to develop a combined rating system and to establish criteria for multiple residential noises. Subjective reactions such as annoyance, activity disturbance, sleep disturbance, and satisfaction to overall noise environment and each residential noise were recorded. The effect of individual noise perception on the evaluation of the overall noise environment was also investigated. The survey results showed that satisfaction for floor impact noise most greatly affects the overall satisfaction for overall noise environment and annoyance most greatly affects the satisfaction for individual noise sources. Auditory experiments were undertaken to determine the percent satisfaction for individual noise levels. Result of auditory experiment showed that the noise level corresponding to 40 % satisfaction is 49 dB $(L_{i,Fmax,AW})$ for floor impact and is about 40 dB(A) for airborne, drainage and traffic noise. From the results of the survey and the auditory experiments, an equation for predicting the overall satisfaction for multiple noises was developed and a classification of multiple residential noises was proposed.

  • https://doi.org/10.5050/KSNVN.2006.16.10.1005 인용 PDF KSCI

Free Vibration Analysis of Cantilevered Composite and Hybrid Composite Triangular Plates (외팔형 복합재료 및 혼합적층 삼각판의 자유진동 해석)

  • 최명환;이영신
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 1992.10a
    • /
    • pp.153-157
    • /
    • 1992

  • 본 연구에서는 복합재료와 혼합적층 외팔형 삼각판의 동적거동을 실험을 통하여 파악하였다. 또한 실험 결과들의 비교를 위해서 FEM 해석을 수행하였다. 실험과 FEM의 결과들은 고유진동수(Hz)로 제시하였고, 또한 참고문헌과의 비교를 위해서 무차원 진동수매개 변수로 나타내었다. 그리고 외팔형 삼각판의 노달라인을 나타내었다.

  • PDF