Detail publikačního výsledku

Near Field Acoustic Holography with Double Layer Array Processing

HAVRÁNEK, Z.; JACOBSEN, F.

Originální název

Near Field Acoustic Holography with Double Layer Array Processing

Anglický název

Near Field Acoustic Holography with Double Layer Array Processing

Druh

Abstrakt

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

acoustic holography, sound sources, acoustic pressure, double-layer microphone array

Klíčová slova v angličtině

acoustic holography, sound sources, acoustic pressure, double-layer microphone array

Autoři

HAVRÁNEK, Z.; JACOBSEN, F.

Vydáno

01.05.2006

ISSN

1610-1928

Periodikum

Acta Acustica united with Acustica

Svazek

92

Číslo

5

Stát

Spolková republika Německo

Strany od

25

Strany počet

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"
}