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Location and quantification of noise sources on a wind turbine
Abstract Acoustic field measurements were carried out on a three-bladed wind turbine with a rotor diameter of 58 m, in order to characterize the noise sources and to verify whether trailing edgeExpand
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CLEAN Based on Spatial Source Coherence
TLDR
A new deconvolution method for acoustic array measurements is proposed: CLEAN-SC, based on spatial source coherence. Expand
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Location of rotating sources by phased array measurements
A method is described for the location of moving sources by a microphone array. This method can be applied to out-of-flow measurements in an open jet wind tunnel. For that purpose, an expression isExpand
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Experimental techniques for identification and characterisation of noise sources
TLDR
An introduction is given of phased array beamforming with microphone arrays. Expand
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DETERMINATION OF ABSOLUTE LEVELS FROM PHASED ARRAY MEASUREMENTS USING SPATIAL SOURCE COHERENCE
¶The phased array technique is a valuable tool in acoustic testing for its capability to distinguish between different source locations. However, the interpretation of phased array measurements isExpand
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Determination of Absolute Contributions of Aircraft Noise Components using Fly-Over Array Measurements
†For wind tunnel array measurements, the source power integration technique has proved to be a valuable technique to determine absolute source levels. This paper describes the extension of the sourceExpand
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Quantification of Airframe Noise Using Microphone Arrays in Open and Closed wind Tunnels
The reliability of the phased array technique for quantifying airframe noise was assessed in the DNW-LLF open and closed wind tunnel sections. Acoustic measurements were performed on wing noise fromExpand
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Improving beamforming by optimization of acoustic array microphone positions
Assigning proper positions to microphones within arrays is essential in order to reduce or eliminate side- and grating lobes in 2D beamform images. In this paper an objective function is derivedExpand
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inverse integration method for distributed sound sources
TLDR
In this contribution, three integration techniques are suggested to overcome this issue based on models considering a single point source, a line source and several line sources, respectively. Expand
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