scholarly journals Identification and probabilistic response prediction methods for actual sound insulation systems contaminated by background noise.

1998 ◽  
Vol 19 (2) ◽  
pp. 113-120
Author(s):  
Noboru Nakasako ◽  
Mitsuo Ohta
Keyword(s):  
Background Noise ◽  
Response Prediction ◽  
Sound Insulation ◽  
Prediction Methods ◽  
Insulation Systems ◽  
Probabilistic Response

scholarly journals Comparison of multi-response prediction methods

2019 ◽  
Vol 190 ◽  
pp. 10-21 ◽  
Author(s):  
Raju Rimal ◽  
Trygve Almøy ◽  
Solve Sæbø
Keyword(s):  
Response Prediction ◽  
Prediction Methods

SYSTEM MODELING BY A NEO-FUZZY-NEURON WITH APPLICATIONS TO ACOUSTIC AND CHAOTIC SYSTEMS

1995 ◽  
Vol 04 (01n02) ◽  
pp. 73-91 ◽  
Author(s):  
EIJI UCHINO ◽  
TAKESHI YAMAKAWA
Keyword(s):  
System Modeling ◽  
Chaotic Signal ◽  
Sound Insulation ◽  
Target System ◽  
Generalization Capability ◽  
New Approach ◽  
Future Behavior ◽  
Insulation Systems ◽  
Nonlinear Chaotic System ◽  
Actual Effectiveness

This paper describes a new approach to system modeling by using a neo-fuzzy-neuron. The target system is modeled adaptively by simply feeding its input and output data to the neo-fuzzy-neuron, whose basic principle was proposed by the authors in 1992. Firstly, the neo-fuzzy-neuron is applied to the restoration of a saturated and/or intermittent speech or chaotic signal to show its actual effectiveness. It is then enhanced in order to get a better generalization capability. The enhanced version of the neo-fuzzy-neuron could facilitate to identify clearly the nonlinear chaotic system, and could most likely predict the future behavior of the system. The neo-fuzzy-neuron was further applied to the identification of actual sound insulation systems. The application was a success and provided promising results.

Development of Out-Wall External Thermal Insulation System Based on Rock-Wool

2012 ◽  
Vol 174-177 ◽  
pp. 1589-1592
Author(s):  
Ming Gang Xu ◽  
Xu Wang ◽  
Zhuo Wei Ding
Keyword(s):  
Thermal Insulation ◽  
Thermal Conductivity Coefficient ◽  
Outer Wall ◽  
Sound Insulation ◽  
Insulation System ◽  
Stable Chemical ◽  
Insulation Systems ◽  
Saving Measure ◽  
Insulation Performance ◽  
Rock Wool

The outer-wall thermal insulation system has been wide used in civil engineering as an effective energy-saving measure. At present, the organic flammable thermal insulation materials such as EPS and XPS are used in outer-wall thermal insulation system in China, which leads to great fire damage probably. The rock-wool is described in detail on its merits such as good thermal insulation performance, good sound insulation performance, light weight, low thermal conductivity coefficient, incombustibility, innocuity and stable chemical capability. Two popular outer-wall external thermal insulation systems are introduced. The construction sequence of the outer-wall external thermal insulation system with rock-wool slabs, mortar and thin layer plastering technology is described.

Gearbox Noise Reduction: Prediction and Measurement of Mesh-Frequency Vibrations Within an Operating Helicopter Rotor-Drive Gearbox

1974 ◽  
Vol 96 (2) ◽  
pp. 567-577 ◽  
Author(s):  
R. H. Badgley ◽  
R. M. Hartman
Keyword(s):  
Noise Reduction ◽  
Analytical Methods ◽  
Response Prediction ◽  
Essential Elements ◽  
Rolling Element Bearing ◽  
Helicopter Rotor ◽  
Prediction Methods ◽  
Spectrum Prediction ◽  
Rotor Drive ◽  
Prediction Techniques

This paper presents correlations between analysis and test results for a complex mechanical system. While the paper is specificially concerned with a helicopter rotor-drive gearbox, the results and methods employed are general enough to be broadly applicable to gearboxes of all kinds. The development of gearbox noise reduction technology has been the objective of an extensive U. S. Army-supported program over the past five years. The gearbox noise problem has been recast as a mechanical vibrations problem, and detailed analytical methods have been developed to treat it. Gear excitation analyses, drive-train response analyses, and empirically-based acoustic spectrum prediction methods have been developed and published in considerable detail. Rolling-element bearing stiffness prediction methods and thin-shell vibration response prediction techniques have been shown to be essential elements in the procedure. In order to verify the analytical methods, a detailed and comprehensive test program was undertaken on a complete CH-47 forward-rotor-drive gearbox, operating under normal torque conditions in a test-cell environment. At the same time, predictions were made of quantities to be measured using the previously published analytical methods. Comparisons between predicted and measured quantities show reasonably good correlation, indicating that the analytical procedures are suitable for careful use in gearbox design or redesign efforts directed at vibration and noise reduction. Areas in which the analytical methods can be improved were also identified.

scholarly journals Vibrometry Assessment of the External Thermal Composite Insulation Systems Influence on the Façade Airborne Sound Insulation †

2018 ◽  
Vol 8 (5) ◽  
pp. 703 ◽  
Author(s):  
Daniel Urbán ◽  
N.B. Roozen ◽  
Herbert Muellner ◽  
Peter Zaťko ◽  
Alexander Niemczanowski ◽  
...  
Keyword(s):  
Sound Insulation ◽  
Airborne Sound ◽  
Insulation Systems
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