An investigation on the statistical properties of noise at residential building facades

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An investigation on the statistical properties of noise at residential building facades


Author: Chu, Ho-kin
Title: An investigation on the statistical properties of noise at residential building facades
Degree: M.Sc.
Year: 2000
Subject: Dwellings -- Noise
Architectural acoustics -- Measurement
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Dept. of Building Services Engineering
Pages: xii, 100 leaves : ill. ; 30 cm
Language: English
Abstract: Extensive noise measurements were performed over 275 numbers of various locations at residential building facades in Hong Kong where the equivalent sound pressure level can be as low as 33dBA and as high as 78dBA. An interesting finding is from Tang [1,2] who showed that the existence of a well defined distribution function for the noise level fluctuations inside air-conditioned landscaped offices and canteen noise studies in Hong Kong. Hong Kong is a densely populated and technologically advanced city. The noise sources are large in number and wide in variety. Noise becomes a problem afflicting most residential building premises and detracts the quality of life of Hong Kong people significantly [3]. It is valuable to investigate the statistical properties to find the application of the captioned function for noise at residential building facades. The measured noise climate (L10-L90) level distribution of the noise records is closer to three numbers of Pearson Type III distributions superimposed. The three distributions correspond approximately to the noise climate measured in residential building facades with greater, fair and smaller noise climate conditions. The captioned function is found to be applicable for noise at residential building facades under certain division of data records in three categories of high, median and low in slope of various percentile levels LNs against the equivalent sound pressure level Leq with reference to the corresponding three numbers of noise climate conditions that appear in the community noise. Results enable to give engineers and acousticians some ideas of the noise fluctuation characteristics from the specification of a single Leq. The data collection requirements for the evaluation of the acoustical environment for noise at residential building facades can be reduced. Present findings in the statistical properties of noise at residential building facades will be beneficial to the evaluation of community noise and helps the predication of environmental noise as a workable basis to make in line with the multiple and diverse units and standards or the associated corrections as stipulated in the various noise control legislation for future reduction of the noisiness. The results are also valuable for the existing or future transport, building and urban design and planning.

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