Detail publikačního výsledku

Local patch acoustic holography methods in enclosed spaces

HAVRÁNEK, Z.; BEJČEK, L.

Originální název

Local patch acoustic holography methods in enclosed spaces

Anglický název

Local patch acoustic holography methods in enclosed spaces

Druh

Abstrakt

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

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

Klíčová slova v angličtině

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

Autoři

HAVRÁNEK, Z.; BEJČEK, L.

Rok RIV

2010

Vydáno

01.05.2008

Nakladatel

ASA

Místo

USA

ISSN

0001-4966

Periodikum

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA

Svazek

123

Číslo

5

Stát

Spojené státy americké

Strany od

1

Strany do

1

Strany počet

1

BibTex

@misc{BUT60939,
  author="Zdeněk {Havránek} and Ludvík {Bejček}",
  title="Local patch acoustic holography methods in enclosed spaces",
  year="2008",
  journal="JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA",
  volume="123",
  number="5",
  pages="1--1",
  publisher="ASA",
  address="USA",
  issn="0001-4966",
  note="Abstract"
}