A Study on the Computation and Application of Sound Power Level for Road Traffic Noise of Renewal Area

As the first step to obtain a city urban area noise map of road traffic noise, sound power levels of vehicles on the roads should be accurately estimated over a wide area. In Japan, ASJ RTN-Model 2018 was proposed as the representative road traffic noise prediction model, and by using the model sound power level of a vehicle can be determined if the vehicle type, traveling speed, and driving mode are known. As such data on urban road network, the Ministry of Land, Infrastructure and Transport of Japan publishes the road traffic census including road traffic volume and travel speed of major roads in Japan. The data, however, is limited to major roads and there is no data on minor roads. In this study, to estimate noise condition and situation on arbitrary road, a method for estimating the traveling speed and the traffic volume of vehicles on the road from aerial photographs was examined. Road traffic noise levels along several roads in Tokyo were analyzed by the proposed method and the validity of the calculation results were verified by comparing with short-time measurement results obtained along the target roads.

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A simulation of traffic noise emissions at a roundabout based on a cellular automaton model

Acta Acustica ◽

10.1051/aacus/2021037 ◽

2021 ◽

Vol 5 ◽

pp. 42

Author(s):

Canyi Du ◽

Xinfa Qiu ◽

Feng Li ◽

Ming Cai

Keyword(s):

Cellular Automaton ◽

Road Traffic ◽

Power Level ◽

Traffic Noise ◽

Traffic Volume ◽

Sound Power ◽

Noise Emission ◽

Urban Road ◽

Speed Distribution ◽

Sound Power Level

The calculation and evaluation of traffic noise is an important task in urban road design. Roundabouts are a common form of urban road intersection. The complexity of traffic operations makes the calculation of traffic noise near a roundabout challenging. To explore traffic noise at roundabouts, a cellular automaton traffic flow model for a two-lane roundabout is established. Based on this model, a dynamic simulation method for traffic noise at roundabouts is proposed. The traffic operation and noise emissions at a roundabout are simulated. The vehicle speed distribution and traffic noise distribution at the roundabout are analysed, and the relationship between the traffic volume and sound power level of the cells is discussed. Finally, the proposed method is compared with existing traffic noise models, and the accuracy and efficiency of the proposed method are verified. The results of this paper show that the speed distribution and noise emission distribution at the roundabout are not uniform. When the traffic volume increases to saturation, the noise emission on the ring road will not keep increasing, and the sound power level of the cells on the inner ring is approximately 2 dBA higher than that of the outer ring. The methods and results in this paper may be valuable for road traffic design and noise control.

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A road traffic noise pattern simulation model that includes distributions of vehicle sound power levels

Applied Acoustics ◽

10.1016/j.apacoust.2016.04.010 ◽

2016 ◽

Vol 111 ◽

pp. 170-178 ◽

Cited By ~ 13

Author(s):

Bert De Coensel ◽

A.L. Brown ◽

Deanna Tomerini

Keyword(s):

Simulation Model ◽

Road Traffic ◽

Traffic Noise ◽

Road Traffic Noise ◽

Sound Power ◽

Noise Pattern ◽

Pattern Simulation

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Field measurements of sound power spectrum for predicting road traffic noise

Acoustical Science and Technology ◽

10.1250/ast.41.622 ◽

2020 ◽

Vol 41 (3) ◽

pp. 622-625

Author(s):

Yasuaki Okada ◽

Shinichi Sakamoto ◽

Akinori Fukushima

Keyword(s):

Power Spectrum ◽

Road Traffic ◽

Traffic Noise ◽

Field Measurements ◽

Road Traffic Noise ◽

Sound Power

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Prediction of Highway Traffic Noise - Estimation of Sound Power Level Emitted by Vehicles

Transactions of the Korean Society for Noise and Vibration Engineering ◽

10.5050/ksnvn.2002.12.8.581 ◽

2002 ◽

Vol 12 (8) ◽

pp. 581-588 ◽

Cited By ~ 2

Keyword(s):

Power Level ◽

Traffic Noise ◽

Noise Estimation ◽

Sound Power ◽

Highway Traffic ◽

Sound Power Level

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Parameter Estimation for Traffic Noise Models Using a Harmony Search Algorithm

Journal of Applied Mathematics ◽

10.1155/2013/953641 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6

Author(s):

Deok-Soon An ◽

Young-Chan Suh ◽

Sungho Mun ◽

Byung-Sik Ohm

Keyword(s):

Parameter Estimation ◽

Prediction Models ◽

Road Traffic ◽

Traffic Noise ◽

Harmony Search ◽

Measurement Data ◽

Road Surface ◽

Road Traffic Noise ◽

Sound Power ◽

Noise Prediction

A technique has been developed for predicting road traffic noise for environmental assessment, taking into account traffic volume as well as road surface conditions. The ASJ model (ASJ Prediction Model for Road Traffic Noise, 1999), which is based on the sound power level of the noise emitted by the interaction between the road surface and tires, employs regression models for two road surface types: dense-graded asphalt (DGA) and permeable asphalt (PA). However, these models are not applicable to other types of road surfaces. Accordingly, this paper introduces a parameter estimation procedure for ASJ-based noise prediction models, utilizing a harmony search (HS) algorithm. Traffic noise measurement data for four different vehicle types were used in the algorithm to determine the regression parameters for several road surface types. The parameters of the traffic noise prediction models were evaluated using another measurement set, and good agreement was observed between the predicted and measured sound power levels.

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