noise modeling Articles

  • 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

  • HAV mis-measurement – to no standards whatsoever…

    Misunderstanding Hand Arm Vibration monitoring marketing material can put hands and safety policies at risk. Caveat emptor. We are regularly asked about new vibration measurement technology, particularly re the latest hand-held, glove or wrist mounted transducers that are presented as the latest assessment improvements. Whilst they may be useful tools, unfortunately some claims have been ...

  • Environmental Noise

    Introduction The ability to hear sounds is a sensory function vital for human survival and communication. However, not all sounds are wanted. 'Unwanted sounds', for which the term 'noise' is normally used, often have their origin in human activities (mainly transport, industry and households). This article addresses environmental noise ­ also referred to in the scientific literature as ...

  • Canarina CUSTIC software · noise abatement modeling · noise analysis · introduction 7

    The intensity of two sounds L1 and L2 can be added in decibels with the standard equation: LdB=10 log[(p1/p0)2+[(p2/p0)2] and then, LdB=10 log[10L1/10+ 10L2/10] In this way, ...

  • The Cost of Noise - The Effects of Road Noise on House Prices

    The Danish Department of the Environment (Miljøstyrelsen) has recently published findings of its research into the effects of road noise on house prices. The Danish Government is evaluating different initiatives to reduce road noise, taking the cost and benefits into consideration. To be able to estimate the benefits (health and welfare) associated with reducing road noise, it is necessary ...

  • Noise mapping of industrial sources

    Noise is often one of the environmental variables where it seems more difficult to guarantee full compliance with legal limits in complex industrial situations and/or in other multi-source environments. This paper describes the application of noise mapping techniques to industrial sources, such as factories, power plants, wind farms, showing the potential of its use, both at the design stage as ...


    By dBLab, Lda

  • Modelling of friction-induced noise of timing belt

    This article presents a study of friction noise of timing belt. A historical review is given and an analytical model is proposed to illustrate friction noise generation mechanism. The analysis suggests that the friction noise of timing belt is due to the friction-induced mode coupling of tooth bending modes. A new mechanism of instability for tooth slippage is proposed and used to correlate ...


    By Inderscience Publishers

  • Noise Monitors and Meters

    Sound level meters Description and ApplicationsThe sound level meter is a lightweight instrument for the measurement of sound pressure level (SPL) in decibels. All ANSI-approved meters meet minimum requirements that include an A-weighted network, a slow-response meter characteristic, and a fully graduated scale with measurements ranging from 80 to 130 dBA. The Type II meter is most frequently ...

  • 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 of roads in England

    Landmark Solutions, the UK provider of geospatial information, solutions and services, was selected by DEFRA as the prime contractor to carry out noise mapping for the Potteries area of the West Midlands. This work forms part of the Government’s National Ambient Noise Strategy (NANS), part of which is focused on mapping noise levels from roads, railways, aircraft and industrial sites across ...


    By Landmark Information Group

  • 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 ...

  • Measuring Road Traffic Noise

    As part of an overall measurement programme to monitor road traffic noise in Århus (Denmarks second largest city), the Local Authority set up a noise measurement station on one of the major approach roads to Århus Harbour. This noise measurement station continually measures noise levels and can give a round-the-clock picture of noise level variations. Like most other districts, Århus Local ...

  • 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

  • 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

  • Integrated noise calculation and evaluation according to the EU directive on environmental noise

    The model data for acoustic calculations already contains essential characteristics for more in depth evaluation of the results (i.e. building heights, number of storeys, or ground space per storey). With additional information such as building usage and number of inhabitants, the evaluation and graphical representation of the results can be completed with only a small increase in expense. ...


    By SoundPLAN International LLC

  • In-depth workplace noise risk assessments

    Don’t miss a thing with a custom-made noise measurement kit Pulsar Safety Professional System: the-all-in one solution to noise measurement Pulsar Instruments’ Safety Professional noise measurement system offer Safety, Health, Environmental and Quality (SHEQ) experts a custom-made solution for resolving their complex workplace noise risk ...


    By Pulsar Instruments plc

  • The Investigation of Noise Attenuation by Plants and the Corresponding Noise-Reducing Spectrum

    As noise pollution is becoming more and more serious, many researchers are studying the noise attenuation effect provided by plants. This article examines six kinds of evergreens as research subjects so as to compare the different arrangements and densities of plants and their effect on noise attenuation. The authors studied the relationship between each of the plant’s characteristics (the ...

  • Canarina CUSTIC software · aircraft noise · airport noise · algorithms 2

    For an external source, the noise level equation is   Leq=LW-20Log(r)-11dB(A)   where r is the distance and LW the source power. However, for an industrial complex, the next equation will be used: ...

  • 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

  • Electronic noise data reporting mechanism

    This handbook has been developed to facilitate Member State reporting in a common format while ensuring that the reporting requirements of the END are met, among other voluntary information that could be facilitated. It addresses the reporting obligations set out in the END and provides reporting templates for MS to utilise, directly downloadable from Reportnet. This handbook has been prepared by ...

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