Microphone positioning optimization for conditioning inverse tonal fan noise

Presezniak, Flavio; Steenackers, Gunther; Guillaume, Patrick

doi:10.1016/j.ymssp.2010.02.009

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…The method of selecting the location of the sound receiver. 23 In the latter method, the value of CN of the matrix can be reduced by choosing the location of the sensors in such a way that the effects of measurement errors are diminished.…”

Section: -mentioning

confidence: 99%

“…Presezniak determined the best possible location for measuring the sound of a fan with the lowest measurement errors. 23 They found that by placing the receivers regularly in a circle on the blade's rotation surface, the measurement errors were greatly diminished.…”

Section: Introductionmentioning

confidence: 99%

“…The method of choosing the position for the acoustic receiver. 23 In this study both methods are used to overcome the effects of measurement error. As previously stated, the arrangement of sound receivers is arbitrary in the algorithm.…”

Section: Introductionmentioning

confidence: 99%

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Acoustic model order reduction for the lowest condition number in inverse method

2017

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Acoustic sources with wide surfaces can be broken down in a fluid environment into smaller acoustic sources. In this study, a general model is presented, indicating the type, number, direction, position and strength of these sources in such a way that the main sound and the sound of the equivalent sources match each other acceptably. When the position and direction of the source is determined, the strength of the source can be found using the inverse method. However, since the solution is not unique in the inverse method, a different acoustic strength is obtained for the sources if different positions are selected. By selecting an arrangement of general sources and using an optimization algorithm, the least possible mismatch between the main sound and the sound of equivalent sources can be achieved. In the inverse method, it is important to reduce the effects of measurement errors. The sensor placement and acoustic model order reduction (AMOR) are studied for reducing these effects. © 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

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Section: -mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Acoustic model order reduction for the lowest condition number in inverse method

2017

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“…This study was extended by Presezniak and the best possible location for measuring the sound of a fan with the least effect of measurement errors was determined. 7 The found that by placing the receivers regularly on a circle in the blades rotation surface, the measuring errors would effectively diminish. Trabelsi et al 8 obtained unsteady rotating forces distribution on the blade of a fan using far-field sound pressure.…”

Section: Introductionmentioning

confidence: 99%

Developing general acoustic model for noise sources and parameters estimation

2017

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Noise measured at various points around the environment can be evaluated by a series of acoustic sources. Acoustic sources with wide surface can be broken down in fluid environment using some smaller acoustic sources. The aim of this study is to make a model to indicate the type, number, direction, position and strength of these sources in a way that the main sound and the sound of equivalent sources match together in an acceptable way. When position and direction of the source is given, the strength of the source can be found using inverse method. On the other hand, considering the non-uniqueness of solution in inverse method, a different acoustic strength is obtained for the sources if different positions are selected. Selecting an arrangement of general source and using the optimization algorithm, the least possible mismatch between the main sound and the sound of equivalent sources can be achieved.

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