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Assessment of Annoyance caused by Construction Noises

Title
Assessment of Annoyance caused by Construction Noises
Author
이성찬
Advisor(s)
전진용
Issue Date
2016-02
Publisher
한양대학교
Degree
Doctor
Abstract
Because the acoustic environments of construction sites include multiple noise sources from various construction machines, it is necessary to consider the influence of combined construction noise on annoyance. The aim of this study is to suggest methods to reduce annoyance caused by combined construction noise on site. To achieve the aim of this study, field measurements and a survey have been conducted and evaluated the construction site noise from machines in operation. Auditory experiments of individual construction noise and combined construction noise have been conducted to identify the optimum stationary to mobile machine noise ratio (SMR). Finally, mitigation designs of construction noise have been developed through site evaluations in order to adjust the stationary to mobile machine noise ratio. For field measurements, construction noise from fifteen machines was measured at several construction sites. Physical and psychoacoustic parameters were analyzed. The survey was a self-reported questionnaire completed by 110 respondents, all of whom are engineers on construction site. The survey found that the most common adverse outcome of construction noise was annoyance and the most annoying construction stage and construction machines were demolition and breakers, respectively. To examine the effects of combined construction noise on annoyance, six construction machines, including machines for foundation work (pile drivers, earth augers, and pay loaders) and demolition work (breakers, bulldozers, and excavators) were selected as noise sources in construction sites. Auditory experiments were designed to quantify the annoyance caused by the machines’ individual and combined noise. The results show that both individual and combined noise correlate well with the equivalent sound level (LAeq), but that the annoyance caused by combined noise is significantly higher than the annoyance caused by individual noise when LAeq increases over 65 dBA. Among the psychoacoustic measures, loudness is the most important in determining the annoyance caused by individual noise, whereas both loudness and roughness significantly impact the annoyance caused by combined construction noise. Ranges of an optimum stationary-to-mobile machine noise ratio between two construction machine noises are suggested to minimize the annoyance caused by combined noise. Optimum stationary-tomobile machine noise ratio ranges usually include 0 dBA when reference construction noise levels (e.g., pile driver or breaker) are lower than 60 dBA, whereas the stationaryto- mobile machine noise ratio should be greater than 5 dBA as construction noise levels exceed 65 dBA. To adjust stationary-to-mobile machine noise ratio in construction sites, customized noise barriers are developed for breaker, excavator, etc. These findings provide useful information to establish effective noise management plans for combined noise sources in construction sites.
URI
https://repository.hanyang.ac.kr/handle/20.500.11754/127474http://hanyang.dcollection.net/common/orgView/200000427913
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > ARCHITECTURAL ENGINEERING(건축공학과) > Theses (Ph.D.)
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