Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: Definition of the closed virtual cavity Ω and its boundary surfaces

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: Schematic diagram of double layer pressure measurements

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: Definition of (a) two baffled piston sources in antiphase and (b) patches meshed on the virtual surfaces around sources

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: All hologram surfaces required for double layer pressure measurements

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: The condition number of patch impedance matrices for maximal order of modes extracted up to (-) 9 × 9 × 1, (--) 13 × 13 × 5, (•••) 15 × 15 × 7, and (-•) 18 × 18 × 10

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: The pressure distributions of patches on the virtual surface S0 at 400 Hz: (a) without a disturbing source and (b) with a disturbing source

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: Source velocities distribution at 400 Hz of (a) theoretical values and reconstructed results obtained using (b) WBH algorithm (ζ = 4.15%) and (c) Tikhonov regularization (ζ = 11.86%)

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: Source velocities distribution at 400 Hz with 15 dB SNR noise of (a) reconstructed results obtained using WBH algorithm (ζ = 5.97%) and (b) Tikhonov regularization (ζ = 26.0%)

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: Performance of the iPTF method with WBH algorithm ((a) and (c)) and Tikhonov regularization ((b) and (d)) at different distances between the two sources at 400 Hz

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: CSNRs of the target sources to a disturbing source on virtual surfaces within a frequency band range

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: Relative errors of the source velocities reconstructed by (–) the iPTF method with Tikhonov regularization and (-) the iPTF method with WBH algorithm with both the disturbing sources and 15 dB SNR noise

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: RVAC computed between the reference source velocity field identified by (-) the iPTF method with WBH algorithm and (–) the iPTF method with Tikhonov regularization adding both the disturbing source and 15 dB SNR noise

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: Experiment setup and measurements: (a) two baffled loudspeakers, a thick wooden, a phase preference microphone, and three measurement microphones and (b) diagram of measurements on side hologram surfaces

Date of download: 10/24/2017 Copyright © ASME. All rights reserved. From: Application of Inverse Patch Transfer Functions Method With Wideband Holography Algorithm to Sparsely Distributed Sources Identification J. Vib. Acoust. 2017;140(1):011008-011008-10. doi:10.1115/1.4037471 Figure Legend: Comparison of source velocities distribution results obtained by the iPTF method with Tikhonov regularization and the iPTF method with WBH algorithm, respectively, at 200 Hz ((a) and (b)) and at 400 Hz ((c) and (d))