engleski

Measuring and modelling environmental noise parameters from different sound sources in complex environments

In this paper measuring and modelling of acoustic parameters from different type of sound sources (point, surface, line) under the influence of surroundings and propagation conditions are discussed thoroughly. The potential influence of different reflection surfaces around sound source and around imission points, the reflection from surface below direct propagation path and the influence of meteorological conditions are considered regarding measurement and modelling results accuracy and precision. Three different case studies are presented with respect to the measurement and modelling results. The point source installed on a building window and imission point near and on the façade of neighbouring object, the unmanned aerial vehicle (drone) above asphalt and grass and a local road and railway as line sound sources are considered. It can be noted that different ways of choosing an input measurement parameters (for example location in standing wave field at some frequency, the reflection surface of plane below sound source, the influence of residual noise) can have significant influence on obtained measurement and modelling environmental noise parameters results.

environmental noise parameters, sound source surroundings, propagation conditions, modelling and measurements

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