Publication detail

Local patch acoustic holography methods in enclosed spaces

HAVRÁNEK, Z. BEJČEK, L.

Original Title

Local patch acoustic holography methods in enclosed spaces

Type

conference paper

Language

English

Original Abstract

The paper compares reconstruction accuracy and computational cost of three patch acoustic holography algorithms applicable in the enclosed spaces for prediction of sound field near sources. Algorithms under investigation were DL-SONAH, classical NAH with spatial transformations and hologram aperture enlargement and IBEM. All of the selected algorithms take an advantage of using double layer microphone array for measurement of sound pressure field. The reconstruction accuracy of all algorithms is determined by using of simple 3D model of curved radiating surface on the basis of calculation of difference between true acoustic quantity (pressure, velocity or intensity) values very close to the surface and predicted sound field at same positions. All these methods use different calculation procedure to obtain predicted sound field near source surface, thus comparison of effectiveness of these algorithms including prediction accuracy-to-computational cost ratio is useful to determination their applicability in practice. Results of prediction error and calculation time are presented and compared.

Keywords

acoustic holography, acoustic imagining, sound sources, holography algorithms, confined space

Authors

HAVRÁNEK, Z.; BEJČEK, L.

RIV year

2008

Released

4. 7. 2008

Publisher

SFA

Location

Paříž, Francie

ISBN

978-2-9521105-4-9

Book

Acoustics'08 Paris Proceedings on CD-ROM

Edition number

1

Pages from

1

Pages to

6

Pages count

6

BibTex

@inproceedings{BUT26771,
  author="Zdeněk {Havránek} and Ludvík {Bejček}",
  title="Local patch acoustic holography methods in enclosed spaces",
  booktitle="Acoustics'08 Paris Proceedings on CD-ROM",
  year="2008",
  number="1",
  pages="1--6",
  publisher="SFA",
  address="Paříž, Francie",
  isbn="978-2-9521105-4-9"
}