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HAVRÁNEK, Z. BEJČEK, L.
Original Title
Local patch acoustic holography methods in enclosed spaces
Type
abstract
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
1. 5. 2008
Publisher
ASA
Location
USA
ISBN
0001-4966
Periodical
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
Year of study
123
Number
5
State
United States of America
Pages from
1
Pages to
Pages count
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" }