Further analysis of traffic noise in a high-rise city

1981 ◽  
Vol 14 (1) ◽  
pp. 75-77
Author(s):  
N.W.M. Ko
Keyword(s):  
Traffic Noise ◽  
High Rise

Investigations on Coherence of Active Control of Traffic Noise Transmission through an Open Window into a Rectangular Room in High-Rise Buildings

2003 ◽  
Vol 34 (8) ◽  
pp. 8-17
Author(s):  
Jiping Zhang
Keyword(s):  
Traffic Noise ◽  
Active Noise Control ◽  
Low Frequency ◽  
Wave Theory ◽  
High Rise ◽  
High Rise Building ◽  
Frequency Components ◽  
Open Window ◽  
Rectangular Room ◽  
Good Agreement

A method for theoretically calculating the coherence between sound pressure inside a rectangular room in a high-rise building and that outside the open window of the room is proposed. The traffic noise transmitted into a room is generally dominated by low-frequency components, to which active noise control (ANC) technology may find an application. However, good coherence between reference and error signals is essential for effective noise reduction and should be checked first. Based on traffic noise prediction methods, wave theory, and mode coupling theory, the results of this paper enable one to determine the potentials and limitations of ANC used to reduce such a transmission. Experimental coherence results are shown for two similar, empty rectangular rooms located on the 17th and 30th floors of a 34 floor high-rise building. The calculated results with the proposed method are generally in good agreement with the experimental results and demonstrate the usefulness of the method for predicting the coherence.

scholarly journals Optimized design research of fully enclosed noise barrier

2022 ◽  
Vol 355 ◽  
pp. 02061
Author(s):  
Jiang Li ◽  
YongBin Li ◽  
Jinhua Tan ◽  
Zhimin Yang
Keyword(s):  
Design Research ◽  
Traffic Noise ◽  
Noise Pollution ◽  
Optimized Design ◽  
High Rise ◽  
Noise Barrier ◽  
The Cost ◽  
Technical Solutions ◽  
And Control ◽  
Control Traffic

Fully enclosed noise barrier has been used to prevent and control traffic noise pollution because of its effectiveness. It has become the best solution for controlling environmental noise of high-rise buildings from expressways, urban viaducts and railways that cross the crowded downtown area. However, its high cost has become an important retarding factor on its application and popularization, so reducing the cost become an urgent problem. The research theory, structure frame, sound absorbing and insulating materials are investigated for the fully enclosed noise barrier, so as to provide technical solutions for optimizing the design scheme and reducing the construction cost.

Indoor traffic noise in a high-rise city

1976 ◽  
Vol 47 (4) ◽  
pp. 599-601 ◽  
Author(s):  
N.W.M. Ko
Keyword(s):  
Traffic Noise ◽  
High Rise

Field measurement of reverberation time and average absorption of one high-rise building room by road traffic noise penetrating facade

2021 ◽  
Vol 263 (4) ◽  
pp. 2875-2886
Author(s):  
Jiping Zhang ◽  
Zheming Wang ◽  
Heng Ma ◽  
Weike Wang
Keyword(s):  
Field Measurement ◽  
Road Traffic ◽  
Traffic Noise ◽  
Field Method ◽  
Room Acoustics ◽  
Road Traffic Noise ◽  
Reverberation Time ◽  
Field Weakening ◽  
High Rise ◽  
High Rise Building

The facade insulation (FI) is one choice for Road traffic noise (RTN) at a high-rise accommodation building nearby a motor road. The weakness of FI is from window, so the window insulation (WI) is also a prioritized descriptor. ISO16283-3 states a field method to measure FI using RTN. However, in room acoustics, besides FI, reverberation time (RBT) or indoor average sound absorption (IASB) are another two un-ignorable descriptors. When the value of IASB is small, the indoor noise is not only contributed from penetrating façade RTN, but also supplemented by the residual sound from high reverberation field, weakening FI. As a parallel to ISO16283-3, this paper suggests an engineering method to measure RBT and IASB of one high-rise building room close to a motor road by penetrating façade RTN. It can supply a convenient tool for the field measurement of RBT and IASB with RTN. At the end, we made a field measurement of RBT, IASB, and WI at a hotel room nearby a viaduct in Hangzhou of China, assistant to adjust RBT or IASB and WI so as to improve the sound quality of the hotel. Further, the method can extend to the lines of rail, aviation, and shipping.

Façade Shaping as Local Means Protecting Against Traffic Noise

2011 ◽  
Vol 97 (5) ◽  
pp. 769-778 ◽  
Author(s):  
Ryszard Janczur ◽  
Elzbieta Walerian ◽  
Mieczyslaw Czechowicz
Keyword(s):  
Simulation Model ◽  
Traffic Noise ◽  
Field Measurements ◽  
Simulation Program ◽  
Noise Abatement ◽  
The Road ◽  
High Rise ◽  
Local Means ◽  
Building Facade ◽  
Traffic Composition

Based on the simulation program, it is possible to modify a shape of a building façade to obtain favourable conditions of acoustical climate. The favourable conditions are searched for in a form of a recess in a building façade creating a vertical niche. Observing the recess parameters and the building position in relation to the road, the range of the total positive effect is defined. The applied simulation program considers a road structure and traffic composition as well as influence of surrounding objects. Adjusting the modelling accuracy, the simulation model validation range is defined. The comparison with the field measurements showed that the simulation model could be applied for upper floors of the high-rise building. For this range, the obtained results can be applied in designing of the noise abatement means.

scholarly journals Analysis of traffic noise distribution and influence factors in Chinese urban residential blocks

2016 ◽  
Vol 44 (3) ◽  
pp. 570-587 ◽  
Author(s):  
Zhiyu Zhou ◽  
Jian Kang ◽  
Zhe Zou ◽  
Hanqi Wang
Keyword(s):  
Noise Level ◽  
Significant Positive Correlation ◽  
Traffic Noise ◽  
Influence Factors ◽  
Significant Negative Correlation ◽  
Noise Distribution ◽  
Positive Correlation ◽  
High Rise ◽  
Building Facade ◽  
Average Noise Level

To improve the acoustic environment of residential blocks, noise mapping is employed in this study to analyze traffic noise distribution and the influence factors of four types of residential blocks in China. The study shows that high-rise small blocks have the highest average noise level ( Lavg) for ground and building facades, followed by small low-rise blocks while modern residential blocks yield the lowest value. An analysis of the standard deviation (STD) of spatial statistical noise level ( Ln) shows that the STD of the ground and building façade of two types of small blocks is higher than that of other blocks. The analysis of influence factors indicates that the lot area of residential block has significant negative correlation with ground and building facade average noise level ( Lavg), and street coverage ratio (SCR) has significant positive correlation with ground and building facade average noise level ( Lavg). In low-rise and high-rise small blocks, ground space index (GSI) has significant negative correlation with ground and building facade average noise level ( Lavg); street interface density (SID) has significant positive correlation with the STDs of ground and building facade noise. Floor space index (FSI) shows significant positive correlation with the STDs of ground and building facade noise in low-rise small blocks.

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