noise prediction Articles

  • Prediction of noise from track systems

    A practical approach is presented for the prediction of noise level generated by a track system at the design stage of a tracked vehicle. Rayleigh's surface integral is adopted for relating the acceleration of a track link chain in the time-domain to the radiated acoustic pressure of the exterior noise. The sound pressure levels of the noise generated by the vibrating track system are calculated ...


    By Inderscience Publishers

  • Implementing noise prediction standards in software

    Software requirements in the 80's Until the 80's most consultancy projects were based on noise measurements due to complaints. As noise legislation became more strict, noise prediction became more important. New national and international noise prediction standards As there was no commercial software available many consultants started to develop their ...


    By Softnoise GmbH

  • Simulation tool for shock absorber noise prediction in time and frequency domains

    This paper investigates the validity of a hydraulic simulation model to calculate the piston rod acceleration for further frequency domain analysis. At the present time, simulation results analyses of shock absorber characteristics are mostly restricted to the low frequency range for the hydraulic behaviour and the high frequency range for Noise, Vibration and Harshness (NVH) studies. However ...


    By Inderscience Publishers

  • Predicting noise, vibration and harshness performance degradation through fatigue analysis

    Vehicle performance from a noise, vibration and harshness (NVH) perspective is typically evaluated at zero mileage. As the vehicle accumulates miles, systems that are considered as NVH sources and systems that are part of a noise and vibration path tend to see some degradation due to loosened joints, burnished gears, burnished bearings, etc. Up to date, efforts made to understand and predict NVH ...


    By Inderscience Publishers

  • Sensitivity analysis of simulation model on railway rolling noise prediction

    The railway rolling noise prediction software (RRNPS) is a simulation model for predicting the sound pressure levels during a train passage due to wheel/rail roughness, based on vibration dynamics, contact mechanics and sound radiation modules. Some field validation has been done under European and Australian conditions. Comparisons between simulations and measurements have shown that this ...


    By Inderscience Publishers

  • Wind Energy Production Estimates: Moving Beyond Time Averages

    No need to be a statistician to see that averages are often useful to compare different things. And yet, they often fall short as a true measure of performance. For instance, we use averages to compare the current weather against the climate normals or to get a sense of how our favorite sport team or player is doing. Team (player) statistics are a concise way of combining the scores from many ...


    By AWS Truepower, LLC

  • Accurate and efficient prediction of acoustical performance of noise barriers against transport noise pollution

    An improved acoustical wave propagator (I_AWP) technique with high-order absorbing boundary technique is introduced to evaluate the acoustical wave interaction for noise barriers, providing the dual benefit of preserving high numerical accuracy (boundary conditions have been properly treated) and obtaining high computational efficiency (using a larger time step in the calculation). The aim is to ...


    By Inderscience Publishers

  • Vehicle interior noise transfer function predictions applying semi-analytical, finite element and boundary element approaches

    The vehicle interior noise transfer functions that affect structure-borne paths critically are analysed using three different numerical techniques, namely the fast numerical modelling, finite element and boundary element. Firstly, the interior noise transfer function predictions employing the fast numerical modelling for simple rectangular cavity model are validated by comparison to the classical ...


    By Inderscience Publishers

  • A three–dimensional CFD approach for prediction of noise reduction of mufflers without mean flow

    A CFD approach, in which the full equations are solved in the time domain, is proposed to calculate noise reduction of a cleaner and a complex exhaust muffler without mean flow. First, two modelling approaches are used to deal with the outlet boundary and to calculate noise reduction of the cleaner without a filter element. The calculated results agree quite well with measurements. Further, the ...


    By Inderscience Publishers

  • Urban Noise Monitoring in Madrid

    Dynamic mapping helps Madrid improve the quality of life for her citizens and visitors alike. With its 3 000 000 inhabitants and 2500 km of streets, Madrid is an excellent example of what can be done to improve human comfort related to urban noise. Since the late 60s, Madrid City Council has been working on noise problems. During this period, global environmental analysis has focused on how ...

  • Noise Moinitoring at Toronto Airport

    Running a Caring Business Toronto Pearson International Airport is Canada's busiest airport. The number of passengers passing through its halls is expected to increase from 28 million in 2001 to around 50 million by the year 2020. The area surrounding the Airport has a population of over 4 million. This presents the Greater Toronto Airports Authority (GTAA) with a major challenge to minimise ...

  • Noise Mapping in Lille

    Lille, with a population of 1091 million inhabitants is the 4th largest agglomeration in France after Paris, Lyon, and Marseille. Situated at the heart of a network of 464 km motorways connecting six European cities (Brussels, Bonn, the Hague, London, Luxembourg and Paris), the metropolis of Lille also has the densest railway network of France after Paris. Pascal Thomas and his team of 8 ...

  • Environmental Noise (Booklet)

    About this booklet This booklet deals with environmental noise − for example, noise from industrial sites, road and rail traffic, airports and fairgrounds. It does not cover related issues such as building acoustics, building vibration or domestic noise. Neither does it cover human response to vibration nor industrial uses of sound and vibration measurements. Please contact ...

  • Procedures to analyse noise maps in connection with noise action plans

    After finishing of the noise mapping of the European Noise Directive1” the noise action planning follows. This part of the END-projects concerns with measures for noise reduction in general and in detail and information and collaboration of the public. In this process a huge amount of measures and alternatives accumulates. Therefore automatic working tools for evaluation of the measures and ...


    By SoundPLAN International LLC

  • Application of data mining techniques in building predictive models for oil and gas problems: a case study on casing corrosion prediction

    This paper describes the use of (supervised) data mining to predict casing corrosion in carbon geological storage projects. This study discusses: 1) data pre–processing such as missing value handling and discretisation; 2) feature selection methods such as correlation coefficient, signal–to–noise ratio, information gain, Gini index, and the k–nearest neighbour (KNN) approach; 3) classification ...


    By Inderscience Publishers

  • Vehicle–road interaction for interior noise measurement and evaluation

    Nowadays, one of the most valuable criteria of vehicle quality assessment is based on acoustic emission levels. A vehicle is judged comfortable depending on the noise levels transmitted inside. Consequently, there is a general attention to the design criteria aimed at improving the structural acoustic behaviour, to comply with the increasingly restrictive ergonomic standard. Therefore, it is ...


    By Inderscience Publishers

  • Computational method for predicting the effects of vibrations to acoustical comfort in vehicle cabin

    One of the main features that attract the customer to purchase a vehicle is the vehicle acoustical and vibration comfort in the vehicle cabin. The exposed noise and vibration will affect the driver's performance in a way that the noise and vibration will distract their vision, which altogether will be stressful to the driver and passenger. Based on previous studies, vibrations are contributed by ...


    By Inderscience Publishers

  • Predicting acoustic transmission loss through laminated glass with air and porous layers

    This study analyses the sound transmission characteristic of various laminated glass designs with application to motor vehicles. The porous interlayer in the laminated glass is filled with polyvinyl butyral (PVB) that serves as an acoustic damper. To model the physics behind the sound transmission losses of the fluid, solid and porous layers, acoustic noise transfer matrices are used to relate ...


    By Inderscience Publishers

  • Noise Calculation Software noise3D online Release 2

    Sankt Augustin, Germany – Sonja Christiansen Informatk GmbH is announcing Release 2.0 of the web enabled noise calculation solution noise 3D online™, a first in 3D noise prediction online services. If you need to predict or map noise levels in the industrial environment and require an affordable tool noise 3D online may be the solution. ...


  • Even Better Environmental Noise - Calculation Software

    Brüel & Kjær’s Prediction Partnership now moves into a new phase with the founding of Softnoise. To celebrate this, we release new versions of the software. Softnoise Originally, Predictor™ Type 7810 was developed solely by DGMR, and Stapelfeldt developed Lima™ Type 7812. Now, DGMR and Stapelfeldt have created a common company, Softnoise, to jointly develop and support both ...

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