✦ LIBER ✦

A stochastic model of the noise field emitted from traffic in steady flow

✍ Scribed by K.W. Yeow

Publisher: Elsevier Science
Year: 1974
Tongue: English
Weight: 728 KB
Volume: 32
Category: Article
ISSN: 0022-460X
DOI: 10.1016/s0022-460x(74)80166-5

No coin nor oath required. For personal study only.

✦ Synopsis

The noise emitted from steady statistically stationary traffic flow is studied analytically from the point of view of a stochastic acoustic model, in order to relate the noise field in terms of the details of the flow, and the acoustic characteristics of the vehicles therein. By making a number of simple assumptions regarding the vehicle as a source of sound, it has been found possible to represent the acoustic emission from a traffic stream comprised of individual vehicles in uniform motion as that from a stream of non-directional acoustic point sources of constant power. The model enables the statistical field properties to be obtained explicitly. The statistical properties obtained in this paper are the time-averaged value and variance of the temporal mean-square sound pressures recorded at a fixed point near the flow and the time-averaged frequency spectrum of the noise field, the predicted values of which are found to agree reasonably well with experiment.

📜 SIMILAR VOLUMES

MODELLING OF THE NOISE SPECTRA OF AXIAL

MODELLING OF THE NOISE SPECTRA OF AXIAL FLOW FANS IN A FREE FIELD

✍ S.F. Wu; S.G. Su; H.S. Shah 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 459 KB

This paper presents a semi-empirical formula for predicting the noise spectra of axial flow fans in a free field. The basic assumption made in deriving this formula is that sound radiation from an axial flow fan in a free field is primarily due to the fluctuating pressure exerted on the fan blade su

A model investigation of the acoustical

A model investigation of the acoustical performance of courtyard houses with respect to noise from road traffic

✍ D.J. Oldham; E.A. Mohsen 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 638 KB

The action of courtyard houses in reducing the noise nuisance from road traffic is examined using the techniques of computer simulation and acoustic scale modelling. This building form is found to be capable of reducing the noise level experienced within a protected space (indoor or outdoor) by a si

A stochastic model of the unsteady state

A stochastic model of the unsteady state age distribution in a flow system

✍ L.T. Fan; Liang-Shih Fan; R.F. Nassar 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 280 KB

Effects of stochasticity in models of th

Effects of stochasticity in models of the cell cycle: from quantized cycle times to noise-induced oscillations

✍ Ralf Steuer 📂 Article 📅 2004 🏛 Elsevier Science 🌐 English ⚖ 739 KB

Noise and fluctuations are ubiquitous in living systems. Still, the interaction between complex biochemical regulatory systems and the inherent fluctuations ('noise') is only poorly understood. As a paradigmatic example, we study the implications of noise on a recently proposed model of the eukaryot

A stochastic model for the simulation of

A stochastic model for the simulation of the natural flow in random packed columns

✍ M. Song; F. H. Yin; K. T. Chuang; K. Nandakumar 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 617 KB

A MODELLING OF THE NOISE FROM SIMPLE COA

A MODELLING OF THE NOISE FROM SIMPLE COAXIAL JETS, PART II: WITH HEATED PRIMARY FLOW

✍ M.J. Fisher; G.A. Preston; C.J. Mead 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 203 KB

This paper reports the second part of a continuing study of the noise of coaxial jets, and describes modifications to the model developed previously to allow for the effects of a heated flow from the primary nozzle. The essential feature of the model described previously for the prediction of the no