Ground effects in environmental sound propagation.
Read Online
Share

Ground effects in environmental sound propagation. by Simon Neil Chandler-Wilde

  • 177 Want to read
  • ·
  • 53 Currently reading

Published in Bradford .
Written in English


Book details:

Edition Notes

Ph.D. thesis. Typescript.

SeriesTheses
ID Numbers
Open LibraryOL13861522M

Download Ground effects in environmental sound propagation.

PDF EPUB FB2 MOBI RTF

There are chapters on ground impedance models and data, methods of measuring ground impedance, ground effects in homogenous atmospheres, sound propagation in refracting and turbulent atmospheres, sound propagation from moving sources, the performance of outdoor noise barriers, the effects of tall vegetation and both numerical and empirical methods for predicting the various influences on outdoor sound. There are chapters on ground impedance models and data, methods of measuring ground impedance, ground effects in homogenous atmospheres, sound propagation in refracting and turbulent atmospheres, sound propagation from moving sources, the performance of outdoor noise barriers, the effects of tall vegetation and both numerical and empirical 5/5(1). Calculations of Inhomogeneous Ground Effects in Outdoor Sound Propagation Using the Boundary Element Method (BEM) DONALD G. ALBERT 1 INTRODUCTION An understanding of the interaction of sound energy with the ground is im-portant in predicting noise propagation through the atmosphere (Embleton et : Donald G Albert. Ground effects on outdoor sound propagation INFLUENCE OF EXTENDED REACTION For a flow resistivity of the order of MKS units the speed of the sound penetrating the pores of the ground medium in the frequency range Hz is considerably less than the speed of sound Cited by:

The meteorological effects on Air-to-Ground sound propagation have been investigated based on the results of the both experiments conducted in and in This paper first presents outline of the series of field experiments. Then the experimental results are investigated to discuss meteorological and ground effects on outdoor sound. 5. the additional effect of a non-flat ground surface; 6. the effect of barriers. Whilst is useful is to understand how each of these effects acting in isolation can modify the propagation of sound, it must always be remembered that in many instances the different effects can interact. Therefore, the cumulative effect under any given set of File Size: KB. Calculating the environmental noise The sound propagation from outdoor stages defined in apply where no Ground effect is defined. (Up to NoizCalc “rural” is the default ground. Modelling After selecting an object type from the toolbar, simply enter the. The few studies on sound propagation in freshwater environments have shown that sound attenuates over less than 1 m (Aiken, ) and that shallow waters act as .

sound propagation is affected by many mechanisms, including: a) Source geometry and type (point, line, coherent, incoherent) b) Meteorological conditions (wind and temperature variations, atmospheric turbulence) c) Atmospheric absorption of sound d) Terrain type and contour (ground absorption of sound, reflections). Propagation of sound close to the ground outdoors involves geometric spreading, air absorption, interaction with the ground, barriers, vegetation . There are chapters on ground impedance models and data, methods of measuring ground impedance, ground effects in homogenous atmospheres, sound propagation in refracting and turbulent atmospheres, sound propagation from moving sources, the performance of outdoor noise barriers, the effects of tall vegetation and both numerical and empirical. Calculation of outdoor sound propagation by engineering methods With ground effect 28 Hard ground 29 Soft ground 30 Ways of predicting sound propagation from environmental noise have history centuries back in time, but it was not until computers were introduced that it File Size: 3MB.