Research on the Prediction of Impact Sound Insulation to a Homogeneous Wall

2015 ◽  
Vol 744-746 ◽  
pp. 1593-1596
Author(s):  
Shang You Wei ◽  
Xian Feng Huang ◽  
Zhi Xiang Zhuang ◽  
Jun Xin Lan
Keyword(s):  
Energy Analysis ◽  
Sound Transmission ◽  
Sound Insulation ◽  
Statistical Energy Analysis ◽  
Analysis Framework ◽  
Mechanism Of Impact ◽  
Sound Reduction ◽  
The Impact ◽  
Insulating Properties ◽  
Reduction Index

In this paper, a theoretical model to evaluate impact sound transmission through a homogeneous wall is proposed. The model which is based on the Statistical Energy Analysis framework exhibits a system with room-wall-room. For the purpose to explore the mechanism of impact sound transmission through a wall, the impact sound reduction index between two rooms are predicted. Meanwhile, the variation of impact sound reduction index with the walls properties are also taken into account. The results reveal that the density, elastic modulus and thickness of a homogeneous wall have diverse effects on its impact sound insulation and can be chosen adequately to achieve ideal insulation values.It provides an approach to optimize impact sound insulating properties of the walls.

A Comparative Study of Sound Transmission Loss Provided by Glass, Acrylic and Polycarbonate

2013 ◽  
Vol 60 (1) ◽  
Author(s):  
Elwaleed Awad Khidir ◽  
Zambri Harun ◽  
Mohd Jailani Mohd Nor ◽  
Muhamad Razi
Keyword(s):  
Transmission Loss ◽  
Sound Transmission ◽  
Sound Insulation ◽  
Sound Transmission Loss ◽  
Material Density ◽  
Airborne Sound ◽  
Single Number ◽  
Reverberation Chambers ◽  
Sound Reduction ◽  
Reduction Index

This article presents an assessment for the airborne sound insulation provided by single glazed panels. The glazed panels were glass, acrylic and polycarbonate with a thickness of 4 mm. The experiments were conducted in a transmission loss facility consisting of semi anechoic and reverberation chambers. The panels were subjected to airborne sound and the data collected. Glass, acrylic and polycarbonate panel absorb noise most effectively above 500 Hz with the absorption peaks at 1000 Hz. The single number sound reduction index (RW) for glass, polycarbonate and acrylic were 41 dB, 38 dB and 37 dB, respectively. This could be attributed mainly to the material density which is higher for the glass. Keywords: Sound transmission loss; glazing; insulation; weighted index

scholarly journals Sound insulation of lightweight partition walls with regard to structural sound transmission

2018 ◽  
Vol 143 ◽  
pp. 01009 ◽  
Author(s):  
Olga Lelyuga ◽  
Sergey Ovsyannikov
Keyword(s):  
Calculation Method ◽  
Energy Analysis ◽  
Sound Transmission ◽  
Theoretical Research ◽  
Sound Insulation ◽  
Statistical Energy Analysis ◽  
Dual Nature ◽  
Sound Fields ◽  
Adjacent Structures ◽  
Partition Walls

The known methods of acoustical calculation in buildings disregard the phenomenon of structural sound transmission, whereas its effect can reach from 2 to 12 dB. The purpose of this paper is to develop the calculation method for sound transmission and vibrations in connected vibroacoustic systems. Theoretical research methods were used based on the theory of statistical energy analysis (SEA) and the theory of self-consistent sound fields with regard to dual nature of sound formation - resonance and inertia. Based on M. Sedov's method of sound fields consistency, a calculation method for sound insulation was developed with integration in SEA methodology. Use of the developed method allows predicting sound transmission through a double-panel partition with the account of adjacent structures.

Prediction on the Sound Insulation of a Double -Leaf Lightweight Panels

2012 ◽  
Vol 594-597 ◽  
pp. 2828-2831 ◽  
Author(s):  
Xian Feng Huang ◽  
Yan Yang ◽  
Zong Xiao Yang
Keyword(s):  
Experimental Data ◽  
Prediction Model ◽  
Energy Analysis ◽  
Sound Transmission ◽  
Measured Data ◽  
Sound Insulation ◽  
Wall Structure ◽  
Statistical Energy Analysis ◽  
Lightweight Panels

Statistical energy analysis (SEA) is utilized to model sound transmission through a double -leaf lightweight. Calculating the sound insulation by this method and comparing with the measured data have shown that the prediction model may generate a certain difference between the prediction and experimental data, this method, moreover, might further solve the problem of the sound insulation of the complex wall structure by optimizing the configuration of the enclosure structure.

Sound and Vibration Transmission Through Panels and Tie Beams Using Statistical Energy Analysis

1971 ◽  
Vol 93 (3) ◽  
pp. 775-781 ◽  
Author(s):  
M. J. Crocker ◽  
M. C. Battacharya ◽  
A. J. Price
Keyword(s):  
Energy Analysis ◽  
Transmission Loss ◽  
Sound Transmission ◽  
Accurate Method ◽  
Acoustic Energy ◽  
Statistical Energy Analysis ◽  
Sound Transmission Loss ◽  
Lateral Shear ◽  
Architectural Acoustics ◽  
Bending Waves

The transmission of sound and vibration through structures is of interest in many noise control problems, including architectural acoustics, sound transmission through aircraft, spacecraft and ships, and the transmission of noise through machinery and engine enclosures. Statistical energy analysis provides a simple and accurate method of approaching these problems. In this paper, theory is examined for the transmission of acoustic energy through single panels, independent double panels, and double panels connected with tie beams. In the single panel case, the theoretical model consists of three linearly coupled oscillators; room-panel-room. The independent double panel case consists of five oscillators; room-panel-cavity-panel-room. In the connected double panel case, the tie beams must be accounted for as the sixth oscillator. A coupling loss factor is determined for the ties by considering the transmission of longitudinal waves, bending waves, and lateral shear waves in the ties. Both resonant and nonresonant transmission are included in the theory. It is shown that for a single panel, the experimental sound transmission loss, panel radiation resistance, and vibration amplitude are all well predicted by the theory. The experimental sound transmission loss is also well predicted in the independent double panel and coupled double panel cases.

A Study of Vibration Transmission in a Framed Building

1994 ◽  
Vol 1 (1) ◽  
pp. 49-64 ◽  
Author(s):  
J.A. Steel ◽  
R.J.M. Craik ◽  
R. Wilson
Keyword(s):  
Energy Analysis ◽  
Sound Transmission ◽  
Statistical Energy Analysis ◽  
Vibration Transmission ◽  
Analysis Methods ◽  
Floor Slabs

Sound transmission through large buildings can be studied using Statistical Energy Analysis (SEA). In this study measurements were carried out to investigate sound transmission through a framed building. Sound transmission between columns, beams, walls and floors is investigated. Sound transmission through the building is investigated and measured and predicted results are shown. Difficulties were encountered when modelling large floor slabs. The work demonstrates the application of Statistical Energy Analysis methods to the study of sound transmission in framed buildings and highlights some of the diiffculties.

Slits' Effects on Sound Insulation for Lightweight Partitions

2014 ◽  
Vol 507 ◽  
pp. 153-156
Author(s):  
Xian Feng Huang ◽  
Quan Shi ◽  
Chen Hui Zhu
Keyword(s):  
Sound Insulation ◽  
High Frequencies ◽  
Rectangular Aperture ◽  
Index Variation ◽  
Sound Reduction ◽  
Reduction Index

The slits on the lightweight partitions have a significant effect on sound insulation which is investigated in this paper. According to Gomperts model for rectangular aperture, the sound reduction index of a wall with slits can be predicted. Two lightweight partitions were selected to analyze their sound reduction index variation with factors such as width, length and location of slits. Results show that these factors affect the sound insulation evidently, especially at high frequencies.

Sound Insulation Determination of Door

2014 ◽  
Vol 1057 ◽  
pp. 215-222 ◽  
Author(s):  
Dušan Dlhý ◽  
Peter Tomašovič
Keyword(s):  
Structural Complexity ◽  
Point Of View ◽  
Sound Insulation ◽  
Laboratory Measurements ◽  
Door Frame ◽  
Small Change ◽  
Sound Reduction ◽  
Reduction Index

The structural complexity of a door causes difficulties in the description of its behavior from an acoustical point of view. In many cases, even a small change can cause a big difference in its sound-isolating properties. To determine the acoustical quality of a door, it is important to perform laboratory measurements of the door structure and door frame, the gaps including. A mathematical analysis based on experimental measurements of the sound reduction index of several door constructions was used to determine the acoustical door categories. The equations for calculating the sound reduction index, which were introduced in this paper, should help in the design of a suitable door from an acoustical point of view.

Prediction on Coincidence Effect of Sound Insulation of a Wall

2011 ◽  
Vol 99-100 ◽  
pp. 354-357
Author(s):  
Xian Feng Huang ◽  
Jun Liu ◽  
Yan Yang
Keyword(s):  
Building Materials ◽  
Energy Analysis ◽  
Sound Insulation ◽  
Light Weight ◽  
Statistical Energy Analysis ◽  
Frequency Range ◽  
Single Leaf ◽  
Comparison Results ◽  
Coincidence Effect ◽  
Sound Environment

Coincidence effect which occurs in a certain frequency range will impairs the sound insulation of walls. For the purpose to predict the phenomenon of coincidence effect that is unlikely predicted theoretically by the mass law, the Statistical Energy Analysis (SEA) theory are adopted in studying coincidence effect of sound insulation of the light weight single-leaf wall. The comparison among predicted by SEA, by mass law and measured was performed. Therefore, the comparison results show that sound insulation prediction by SEA is more precise and agrees with the measured date. Moreover, the coincidence effect and its effect on sound insulation were predicted by SEA. Eventually, it is likely to select appropriate building materials and configuration to achieve a better sound environment theoretically.

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