Publication detail

THE INFLUENCE OF A REALISTIC MICROPHONE ARRAY ON NEAR FIELD ACOUSTIC HOLOGRAPHY

GRATZ, P.

Original Title

THE INFLUENCE OF A REALISTIC MICROPHONE ARRAY ON NEAR FIELD ACOUSTIC HOLOGRAPHY

Type

conference paper

Language

English

Original Abstract

Various methods of visualising sound fields on the basis of measurements with microphone arrays have been examined. The methods are based on the principles of near field acoustic holography (NAH) and include STSF (Spatial Transform of Sound Fields), STSF NAH with Wiener filter, Iterative STSF NAH, and SONAH (Statistically Optimal NAH). A realistic model of a vibrating surface has been developed in order to examine the performance of the different NAH methods with respect to the precision of the estimated sound pressure fields, the calculation time, and the sensitivity to microphone errors and imperfections such as amplitude and phase mismatch. The influence of a realistic microphone array that disturbs the sound field is also investigated using a three-dimensional boundary element model of the array.

Key words in English

sound field, microphone arrays

Authors

GRATZ, P.

Released

8. 7. 2002

Publisher

NASA

Location

Orlando, Florida, USA

Pages from

20

Pages to

25

Pages count

6

BibTex

@inproceedings{BUT5477,
  author="Petr {Grätz}",
  title="THE INFLUENCE OF A REALISTIC MICROPHONE ARRAY ON NEAR FIELD ACOUSTIC HOLOGRAPHY",
  booktitle="Ninth International Congress on Sound anv Vibration",
  year="2002",
  pages="6",
  publisher="NASA",
  address="Orlando, Florida, USA"
}