Publication detail

Local patch acoustic holography methods in enclosed spaces

HAVRÁNEK, Z. BEJČEK, L.

Original Title

Local patch acoustic holography methods in enclosed spaces

English Title

Local patch acoustic holography methods in enclosed spaces

Type

abstract

Language

en

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.

English 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

RIV year

2008

Released

01.05.2008

Publisher

ASA

Location

USA

ISBN

0001-4966

Periodical

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA

Year of study

123

Number

5

State

US

Pages from

1

Pages to

1

Pages count

1

Documents

BibTex


@misc{BUT60939,
  author="Zdeněk {Havránek} and Ludvík {Bejček}",
  title="Local patch acoustic holography methods in enclosed spaces",
  annote="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.",
  address="ASA",
  chapter="60939",
  institution="ASA",
  number="5",
  year="2008",
  month="may",
  pages="1--1",
  publisher="ASA",
  type="abstract"
}