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Main Title: Adjoint-based optimization of sound reinforcement including non-uniform flow
Author(s): Stein, Lewin
Straube, Florian
Sesterhenn, Jörn
Weinzierl, Stefan
Lemke, Mathias
Type: Article
Abstract: The determination of optimal geometric arrangements and electronic drives of loudspeaker arrays in sound reinforcement applications is an ill-posed inverse problem. This paper introduces an innovative method to determine complex driving functions, also considering complex environmental conditions. As an alternative to common frequency domain methods, the authors present an adjoint-based approach in the time domain: Acoustic sources are optimized in order to generate a given target sound field. Instead of the Helmholtz equation, the full non-linear Euler equations are considered. This enables an easier treatment of non-uniform flow and boundary conditions. As proof of concept, a circular and a linear monopole array are examined. For the latter, the environmental conditions include wind and thermal stratification. For all examples, the method is able to provide appropriate driving functions.
Subject(s): fluid dynamics
time domain approach
acoustical properties
partial differential equations
acoustic transducers
acoustic signal processing
fourier analysis
speed of sound
vector fields
Issue Date: 26-Sep-2019
Date Available: 19-Nov-2021
Language Code: en
DDC Class: 534 Schall und verwandte Schwingungen
Sponsor/Funder: DFG, 393106680, Optimale Schallfelderzeugung für Beschallungsaufgaben im Zeit- und Frequenzbereich
Journal Title: The Journal of the Acoustical Society of America
Publisher: Acoustical Society of America (ASA), AIP Publishing
Volume: 146
Issue: 3
Publisher DOI: 10.1121/1.5126516
Page Start: 1774
Page End: 1785
EISSN: 1520-8524
ISSN: 0001-4966
TU Affiliation(s): Fak. 1 Geistes- und Bildungswissenschaften » Inst. Sprache und Kommunikation » FG Audiokommunikation
Appears in Collections:Technische Universität Berlin » Publications

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