23rd AIAA/CEAS Aeroacoustics Conference 2017
DOI: 10.2514/6.2017-3388
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Deconvolution of Azimuthal Mode Detection Measurements

Abstract: Unequally spaced transducer rings make it possible to extend the range of detectable azimuthal modes. The other side of the coin is that the response of the mode detection algorithm to a single mode is distributed over all detectable modes, similarly to the Point Spread Function of Conventional Beamforming with microphone arrays. With multiple modes the response patterns interfere, leading to a relatively high "noise floor" of spurious modes in the detected mode spectrum, in other words, to a low dynamic range… Show more

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Cited by 2 publications
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“…Modern signal processing techniques such as deconvolution techniques [9], quantitative beamforming [10] and Compressed Sensing [11][12][13][14] remove the array sidelobe pattern and yield mode spectra with higher dynamic range and resolution. This is crucial when ring arrays with irregular sensor spacing are applied in order to analyse a larger mode range.…”
Section: Introductionmentioning
confidence: 99%
“…Modern signal processing techniques such as deconvolution techniques [9], quantitative beamforming [10] and Compressed Sensing [11][12][13][14] remove the array sidelobe pattern and yield mode spectra with higher dynamic range and resolution. This is crucial when ring arrays with irregular sensor spacing are applied in order to analyse a larger mode range.…”
Section: Introductionmentioning
confidence: 99%