Day time construction noise

Pao Yue-kong Library Electronic Theses Database

Day time construction noise

 

Author: Yim, Siu-cheung
Title: Day time construction noise
Degree: M.Sc.
Year: 1995
Subject: Noise control -- China -- Hong Kong
Noise control -- Law and legislation -- China -- Hong Kong
Soundproofing
Soundproofing -- Law and legislation
Buildings -- Vibration
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Pages: 1 v. (various paging) : ill. (some col.) ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1205562
URI: http://theses.lib.polyu.edu.hk/handle/200/3903
Abstract: In this dissertation, impacts of the day time construction noise to the nearby community and to the workers on site, evaluation of the present legislation control on construction noise such as the Noise Control Ordinance (NCO) and the Factories and Industrial Undertakings (Noise at Work) Regulation, and means of control on noisy construction equipment has been studied. Construction site survey has been conducted to investigate the noise impacts of the construction site to the Noise Sensitive Receivers (NSRs). The construction sites include those under demolition, road work, site foundation and bridge work. Noise data obtained was analyzed and then checked against the present Noise Control Ordinance to find out its deficiency. It was found that the noise generated from demolition sites and road works caused the most serious impacts to the community. Then, characteristics of noise from demolition sites and road works was analyzed. Control measures such as substitution of the noisy process by other alternatives, control at source, control at transmission path and administration control has been evaluated. It was found that means of noise control at transmission path by noise barrier and acoustic enclosure can effectively minimize the impacts from the demolition sites and road works respectively. Noise control using noise barrier and acoustic enclosure by means of case study and acoustic enclosure tests was discussed in the dissertation. Limitations and effectiveness of noise barrier have been evaluated. Analysis and design procedures for construction equipment enclosures, enclosure types and its construction has been discussed as well. Metal panel type and FRP acoustic enclosure are tested, and it was found that the metal panel type enclosure can have an insertion loss to 30 dBA and the FRP acoustic enclosure can have an insertion loss to 20 dBA. The pros and cons of these two types of enclosures have been compared. Finally, it was concluded that the contractors will only invest money on the noise barriers or acoustic enclosures unless the government lays down noise control regulation on day time construction noise within the time between 7 am and 7 pm not being a general holiday.

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