1. 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): doi: /
Figure Legend:
Definition of the closed virtual cavity Ω and its boundary surfaces

2. 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): doi: /
Figure Legend:
Schematic diagram of double layer pressure measurements

3. 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): doi: /
Figure Legend:
Definition of (a) two baffled piston sources in antiphase and (b) patches meshed on the virtual surfaces around sources

4. 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): doi: /
Figure Legend:
All hologram surfaces required for double layer pressure measurements

5. 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): doi: /
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

6. 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): doi: /
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

7. 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): doi: /
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%)

8. 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): doi: /
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%)

9. 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): doi: /
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

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): doi: /
Figure Legend:
CSNRs of the target sources to a disturbing source on virtual surfaces within a frequency band range

11. 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): doi: /
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

12. 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): doi: /
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

13. 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): doi: /
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

14. 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): doi: /
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))