3D shape optimization of loudspeaker cabinets for uniform directivity

Andersen, Poul; Henrı́quez, Vicente Cutanda; Aage, Niels; Kook, Junghwan

doi:10.1007/s00158-022-03451-2

Cited by 5 publications

(3 citation statements)

References 22 publications

(21 reference statements)

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“…Other studies have also shown the significance of surface micropatterns, as indicated by refs. [132][133][134] These works warrant further in-depth research particularly for suspended 2D material systems.…”

Section: Electrostatic Speakers Based On 2d Materials and Their Compo...mentioning

confidence: 98%

A Review of Acoustic Devices Based on Suspended 2D Materials and Their Composites

Wan,

Liu,

Zheng

et al. 2023

Adv Funct Materials

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Acoustic devices play an increasingly important role in modern society for information technology and intelligent systems, and recently significant progress has been made in the development of communication, sensing, and energy transduction applications. However, conventional material systems, such as polymers, metals and silicon, show limitations to fulfill the evolving requirements for high‐performance acoustic devices of small size, low power consumption, and multifunctional capabilities. 2D materials hold the promise in overcoming the development bottleneck of acoustic devices aforementioned, given their atomic‐thin thickness, extensive surface area, superior physical properties, and remarkable layer‐stacking tunability. By suspending the 2D materials, mechanical and thermal disruption from substrate will be eliminated, which will enable the development of new classes of acoustic devices with unprecedented sensitivity and accuracy. In this review, the recent progress of acoustic devices based on suspended 2D materials and their composites, especially applications in the audio frequency, static pressure, and ultrasonic frequency range, is briefly summarized, emphasizing the advantageous properties of suspended 2D materials and related outstanding device performance. Together with the development of 2D membrane synthesis, transfer, as well as microelectromechanical fabrication process, suspended 2D materials will shed light on the next‐generation high‐performance acoustic devices.

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Section: Electrostatic Speakers Based On 2d Materials and Their Compo...mentioning

confidence: 98%

A Review of Acoustic Devices Based on Suspended 2D Materials and Their Composites

Wan,

Liu,

Zheng

et al. 2023

Adv Funct Materials

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“…The frequency lines and/or angles of incident could also be included in the min-max problem, e.g. [43]. The min-max problem of Eq.…”

Section: Optimization Formulationmentioning

confidence: 99%

Vibroacoustic Topology Optimization for Sound Transmission Minimization Through Sandwich Structures

Cool¹,

Sigmund²,

Aage³

et al. 2023

SSRN Journal

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“…Over the past several decades, a number of numerical approaches have been proposed to calculate the design sensitivities of the static and transient responses of structural systems, compare of Reference 5 and references therein. Also, the shape and topology sensitivity analysis formulations have been presented for acoustic systems and acoustic‐structural interaction systems, 6,7 and applied to the shape optimization of noise barriers, 8 loudspeaker cabinets 9 and the distribution design of sound absorbing materials, 10 and so forth. Moreover, eigenvalue optimization problems also appear frequently when dealing with the structural stability and vibration analysis.…”

Section: Introductionmentioning

confidence: 99%

Design sensitivity analysis of modal frequencies of elastic structures submerged in an infinite fluid domain

Zheng,

Han,

Chen

et al. 2024

Numerical Meth Engineering

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SummaryThis paper presents a numerical approach for the design sensitivity analysis of modal frequencies of elastic structures submerged in an unbounded heavy fluid domain. Because the feedback of sound pressure onto the fluid‐loaded structures has to be taken into account in this case, a fully coupled scheme which combines the structural finite element method (FEM) and the acoustic boundary element method (BEM) is employed in the numerical simulation. The resulting nonlinear eigenvalue problem created by the coupled finite element and boundary element (FE‐BE) method is converted into a generalized eigenvalue problem (GEP) of reduced dimension by using a contour integral method. The design sensitivity formulation for non‐repeated eigenvalues is derived based on an adjoint method which uses both the left and right eigenvectors, and a small GEP is formed to calculate the gradients of repeated eigenvalues. The Burton‐Miller formulation is employed to shift the fictitious eigenfrequencies and their derivatives, and the parameter setting which is beneficial to the filtering of fictitious eigenfrequencies is investigated. Numerical examples are given to verify the accuracy and effectiveness of the developed method.

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3D shape optimization of loudspeaker cabinets for uniform directivity

Cited by 5 publications

References 22 publications

A Review of Acoustic Devices Based on Suspended 2D Materials and Their Composites

A Review of Acoustic Devices Based on Suspended 2D Materials and Their Composites

Vibroacoustic Topology Optimization for Sound Transmission Minimization Through Sandwich Structures

Design sensitivity analysis of modal frequencies of elastic structures submerged in an infinite fluid domain

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