Improvement on sound transmission loss through a double-plate structure by using electromagnetic shunt damper

2020 ◽  
Vol 158 ◽  
pp. 107075 ◽  
Author(s):  
Qibo Mao
Keyword(s):  
Transmission Loss ◽  
Sound Transmission ◽  
Sound Transmission Loss ◽  
Plate Structure

scholarly journals Improvement on sound transmission loss through a double-plate structure by connected with a mass–spring–damper system

2017 ◽  
Vol 9 (7) ◽  
pp. 168781401771394 ◽  
Author(s):  
Qibo Mao ◽  
Hui Shen
Keyword(s):  
Resonance Frequency ◽  
Natural Frequency ◽  
Transmission Loss ◽  
Sound Transmission ◽  
Sound Transmission Loss ◽  
Plate Structures ◽  
Air Mass ◽  
Plate Structure ◽  
Global Cost ◽  
Mass Spring

It is well-known that the acoustic performance of double-plate structures deteriorates rapidly around the mass–air–mass resonance frequency. In this study, a mass–spring–damper system connected between incident and radiating plates is used to improve the sound transmission loss at low-frequency ranges. First, a full structural-acoustic modal coupling model is developed to analyze the vibration and acoustical behaviour of the double-plate structures with mass–spring–damper system. Because there are in-phase or out-of-phase vibrations between double plates, tuning the natural frequency of the mass–spring–damper system exactly to the mass–air–mass resonance frequency cannot guarantee the maximum improvement on transmission loss. Optimal natural frequency and mass of the mass–spring–damper system were found as a solution of optimization problem with a global cost function defined as frequency-averaged sound transmission loss in the desired frequency range (around mass–air–mass resonance frequency). Finally, some numerical calculation results are presented. The calculated results show that the sound transmission loss of a double-plate structure can be improved significantly using optimally tuned mass–spring–damper system. The results indicate that an overall improvement of 12 dB below 1000 Hz can be achieved when the mass of the mass–spring–damper system equals to 10% weight of the double-plate structure.

scholarly journals Analysis of the transmission loss of double-leaf panels with an equivalent spring–mass model for studs

2020 ◽  
Vol 37 ◽  
pp. 126-133
Author(s):  
Yuan-Wei Li ◽  
Chao-Nan Wang
Keyword(s):  
Distribution Curve ◽  
Transmission Loss ◽  
Sound Transmission ◽  
Experimental Results ◽  
Sound Insulation ◽  
Sound Transmission Loss ◽  
Mass Model ◽  
Steel Stud ◽  
Panel Thickness ◽  
Stiffness Distribution

Abstract The purpose of this study was to investigate the sound insulation of double-leaf panels. In practice, double-leaf panels require a stud between two surface panels. To simplify the analysis, a stud was modeled as a spring and mass. Studies have indicated that the stiffness of the equivalent spring is not a constant and varies with the frequency of sound. Therefore, a frequency-dependent stiffness curve was used to model the effect of the stud to analyze the sound insulation of a double-leaf panel. First, the sound transmission loss of a panel reported by Halliwell was used to fit the results of this study to determine the stiffness of the distribution curve. With this stiffness distribution of steel stud, some previous proposed panels are also analyzed and are compared to the experimental results in the literature. The agreement is good. Finally, the effects of parameters, such as the thickness and density of the panel, thickness of the stud and spacing of the stud, on the sound insulation of double-leaf panels were analyzed.

scholarly journals Sound transmission loss of porous materials in ducts with embedded periodic scatterers

2020 ◽  
Vol 147 (2) ◽  
pp. 978-983 ◽  
Author(s):  
Dibya P. Jena ◽  
Xiaojun Qiu
Keyword(s):  
Porous Materials ◽  
Transmission Loss ◽  
Sound Transmission ◽  
Sound Transmission Loss

Numerical Estimation of Sound Transmission Loss in Launch Vehicle Payload Fairing

2016 ◽  
Vol 98 (4) ◽  
pp. 471-478 ◽  
Author(s):  
Pawan Kumar Chandana ◽  
Shashi Bhushan Tiwari ◽  
Kishore Nath Vukkadala
Keyword(s):  
Transmission Loss ◽  
Sound Transmission ◽  
Launch Vehicle ◽  
Sound Transmission Loss ◽  
Numerical Estimation ◽  
Payload Fairing

Sound Transmission Loss of Corrugated and Fluted Panels

1993 ◽  
Vol 40 (2) ◽  
pp. 187 ◽  
Author(s):  
Colin H. Hansen
Keyword(s):  
Transmission Loss ◽  
Sound Transmission ◽  
Sound Transmission Loss

Damping Mass Effects on Panel Sound Transmission Loss

2011 ◽  
Author(s):  
Chong Wang ◽  
Alan Parrett
Keyword(s):  
Transmission Loss ◽  
Sound Transmission ◽  
Sound Transmission Loss ◽  
Mass Effects

OPTIMIZATION OF ANISOTROPIC SANDWICH BEAMS FOR HIGHER SOUND TRANSMISSION LOSS

2002 ◽  
Vol 254 (1) ◽  
pp. 23-36 ◽  
Author(s):  
P. THAMBURAJ ◽  
J.Q. SUN
Keyword(s):  
Transmission Loss ◽  
Sound Transmission ◽  
Sandwich Beams ◽  
Sound Transmission Loss
Sign in / Sign up

Export Citation Format

Share Document