A master thesis from Aalborg University
System for Accurate Acoustic Presentation of Noise Sources
Author(s)
Term
4. term
Education
Publication year
2010
Submitted on
2010-06-04
Pages
145 pages
Abstract
In this thesis, a system that is able to reproduce the sound from noise sources as well as show the different levels present at different distances and wind speeds has been designed. This noise presentation system is composed by a small computer (nanoLIAB) and a user interface designed for it. An overview of the current Danish legislations regarding noise evaluation of several kinds is given so it is known what the guidelines to measure wind turbine noise are. Next, an user guide on how to carry out measurements of wind turbine noise according to the standard IEC 61400 is presented and a measurement following this guide has taken place. The recorded data is evaluated to find possible artifacts that may classify the signal as ``corrupt'' or ``clean'' and a calibration of the system is done. The designed noise presentation system plays back the sound recorded from a wind turbine in combination with a set of parameters that characterize the reproduced signal. The user interface provides a good overview of what is being played, by showing the user relevant data about the source that is being played and enables the user to change the settings and thereby playing a different sound.
Documents
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