Comparison of Fourier transform-based and statistically optimized nearfield acoustical holography in terms of their applicability to active structural acoustic control

Ungnad, Steffen

doi:10.24405/23072

Comparison of Fourier transform-based and statistically optimized nearfield acoustical holography in terms of their applicability to active structural acoustic control

Publication date

2026-03-31

Document type

Wissenschaftliche Vortragsfolien, Präsentation

Author

Ungnad, Steffen

Organisational unit

Mechatronik

DOI

10.24405/23072

URI

https://openhsu.ub.hsu-hh.de/handle/10.24405/23072

Conference

52. Jahrestagung für Akustik (DAGA 2026) ; Dresden ; 23.–26. März 2026

Project

Near-field Acoustical Holography - a new sensor concept for methods of active noise reduction

Publisher

Universitätsbibliothek der HSU/UniBw H

Part of the university bibliography

✅

File(s)

openHSU_23072.pptx (1.2 MB)

Language

English

DDC Class

534 Schall und verwandte Schwingungen

530 Physik

621 Angewandte Physik

Keyword

Vibration

Acoustics

Rayleigh integral

Sound power

Plane waves

Angular spectrum method

Abstract

To observe acoustic sound power during active structural acoustic control, this study compares two algorithms from planar nearfield acoustical holography. The methods address the inverse problem of reconstructing sound field quantities in a source plane by analyzing pressures in a holographic plane, which then allows deduction of sound power. The algorithms examined—Fourier transform-based and statistically optimized nearfield acoustical holography—are derived using DFT matrices and applied to an acoustic line source model, revealing scenarios of equivalence. The suitability of holography as a sensor concept for active acoustic control is also considered.

Version

Author's original

Access right on openHSU

Open access