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HAVRÁNEK, Z. JACOBSEN, F.
Original Title
Near Field Acoustic Holography with Double Layer Array Processing
Type
abstract
Language
English
Original Abstract
Near field acoustic holography (NAH) is an experimental technique for analysing sound fields near sources. A simulation study has been carried out, and this paper examines and compares i) classical planar NAH based on spatial transforms (single layer NAH), ii) a similar technique based on measurements in two parallel planes (double layer NAH), and iii) a method that avoids spatial transforms and thus leakage by using statistical considerations (SONAH). The source is a point driven panel that generates a complicated sound field. The influence of reflections and background noise from other sources is examined. The results indicate improved accuracy in localisation and characterisation of a sound source with double layer array processing in the presence of sources from the 'wrong' side of the measurement array. An investigation of the influence of transducer mismatch errors on the global accuracy of the NAH calculations shows that NAH with single and double layer arrays are affected in a similar manner.
Keywords
acoustic holography, sound sources, acoustic pressure, double-layer microphone array
Authors
HAVRÁNEK, Z.; JACOBSEN, F.
Released
1. 5. 2006
ISBN
1610-1928
Periodical
Acta Acustica united with Acustica
Year of study
92
Number
5
State
Federal Republic of Germany
Pages from
25
Pages to
Pages count
1
BibTex
@misc{BUT60363, author="Zdeněk {Havránek} and Finn {Jacobsen}", title="Near Field Acoustic Holography with Double Layer Array Processing", year="2006", journal="Acta Acustica united with Acustica", volume="92", number="5", pages="1", issn="1610-1928", note="abstract" }