Experiment in feedforward control for the reduction of sound transmission through an elastic plate backed by a rigid rectangular cavity

1994 ◽  
Author(s):  
Graham K. Ellis ◽  
Shozo Koshigoe
Keyword(s):  
Elastic Plate ◽  
Feedforward Control ◽  
Sound Transmission ◽  
Rectangular Cavity

The Sound Transmission Through a Baffled, Thin, Finite, Elastic Plate by Using Boundary Integral Equations

1999 ◽  
Author(s):  
Yasuhito Kawai
Keyword(s):  
Integral Equations ◽  
Elastic Plate ◽  
Boundary Integral Equations ◽  
Sound Transmission ◽  
Coupled System ◽  
Boundary Integral ◽  
Image Method ◽  
Thin Elastic Plate ◽  
Control Engineering ◽  
Sound Fields

Abstract The prediction of sound transmission through a thin elastic plate such as a window is an important problem in the field of noise control engineering. Integral equations which express sound fields in infinite half spaces which are divided off by the baffle and the elastic plate are introduced and combined with the equation of plate vibration to solve as a coupled system. The image method is used in every equation to reduce unknown functions and boundaries which should be considered. Some numerical examples are solved numerically to examine the method.

The System for Active Control of Sound Transmission through a Window Panel – The Concept and Simulation Results

2016 ◽  
Vol 248 ◽  
pp. 35-40
Author(s):  
Leszek Morzyński ◽  
Wiktor Marek Zawieska ◽  
Tomasz Krukowicz
Keyword(s):  
Feedforward Control ◽  
Reference Signal ◽  
Sound Transmission ◽  
Wide Band ◽  
High Amplitude ◽  
Convergence Time ◽  
Signal Spectrum ◽  
Sound Insulation ◽  
Common Mean ◽  
Acoustic Control

High acoustic insulation windows are common mean to decrease sound transmission to closed spaces. Hence, the improvement of sound insulation of windows is very important research issue. In this paper partial results of research project aimed at synthesis of the window panel with actively controlled sound transmission are presented. Recent stage of the project is focused on the development of multichannel Active Structural Acoustic Control algorithm. High amplitude excitation produces nonlinear vibration effects. Using feedforward control strategy it is convenient to control not only the reference signal spectrum, but also additional frequencies generated as the cause of nonlinearity. Therefore neural network based algorithm is considered. To lower the computational burden of the algorithm, round robin based error backpropagation learning is employed. The results of numerical simulations are presented. Major conclusion of presented part of the research is that the algorithm is capable of controlling a wide-band noise efficiently. Reduction of the computational complexity leads to increased convergence time, not influencing the final value of mean square error.

scholarly journals Feedforward control of sound transmission using an active acoustic metamaterial

2017 ◽  
Vol 26 (2) ◽  
pp. 025032 ◽  
Author(s):  
Jordan Cheer ◽  
Stephen Daley ◽  
Cameron McCormick
Keyword(s):  
Feedforward Control ◽  
Sound Transmission ◽  
Acoustic Metamaterial

Sound Transmission in Dual-Coupling System of Elastic Plate and Acoustic Cavity Based on Modal Superposition Method

2013 ◽  
Vol 475-476 ◽  
pp. 1474-1478
Author(s):  
Hong Qiu Li ◽  
Guo Ping Chen
Keyword(s):  
Elastic Plate ◽  
Sound Transmission ◽  
Superposition Method ◽  
Acoustic Cavity ◽  
Modal Superposition ◽  
Coupling System ◽  
Modal Superposition Method ◽  
Cavity System ◽  
Coupling Characteristics ◽  
Plate System

This paper presents a study on the dual-coupling characteristics between elastic plate and acoustic cavity. Modal superposition method was employed to analyze sound transmission in the plate-cavity-plate system and cavity-plate-cavity system. Impedance and mobility methods were also adopted which were easy to investigate the characteristics between the structural and acoustic systems. The expression of sound transmission between plate-cavity-plate system and cavity-plate-cavity system were given.

scholarly journals Basic study on relationship between airborne sound transmission and structure-borne sound radiation of a finite elastic plate

2019 ◽  
Vol 40 (1) ◽  
pp. 52-55 ◽  
Author(s):  
Katsutoshi Takahashi ◽  
Motoki Yairi ◽  
Takeshi Okuzono ◽  
Kimihiro Sakagami ◽  
Masahiro Toyoda
Keyword(s):  
Elastic Plate ◽  
Sound Radiation ◽  
Sound Transmission ◽  
Basic Study ◽  
Airborne Sound

Numerical simulation of active control with on‐line system identification on sound transmission through an elastic plate

1996 ◽  
Vol 99 (5) ◽  
pp. 2947-2954 ◽  
Author(s):  
Shozo Koshigoe ◽  
Allen Teagle ◽  
Ching‐Hsu Tsay ◽  
Shin Morishita ◽  
Soichro Une
Keyword(s):  
Numerical Simulation ◽  
System Identification ◽  
Active Control ◽  
Elastic Plate ◽  
Sound Transmission ◽  
Line System ◽  
On Line
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