Noise Modeling Articles

  • Seeking Clarity in Noise

    Environmental noise regulation can be frustrating. The noise limits, applicable measurement metrics, assessment methods and level of enforcement vary a lot by region and jurisdiction and rarely do they all align. Historically, noise emitters and sensitive receivers could afford to use distance to separate themselves. Consequently, environmental noise laws were first developed in regions with high ...


    By Innova Global Limited.

  • London Hotspots for Noise Nuisance Complaints [Infographic]

    As we continues our quest to build up a noise nuisance map of the UK, we recently turned our attention to our fair Capital, London. With 33 boroughs in Greater London, it was always going to be something of a time-consuming task to get the noise complaints data via Freedom of Information (FOI) requests. However, we were pleasantly surprised by the London Local Authorities efficiencies. The vast ...


    By Cirrus Research plc

  • Traffic Noise Mapping in Chile

    Against this backdrop of economic change, a two-year study got underway across three Chilean cities led by the Univ. Austral. and was supported by the Chilean Ministry of the Environment. Academically titled: “Development and analysis of noise maps of three urban agglomerations using modeling software”, the study concentrated on the Chilean cities of Coquimbo – La ...


    By Cirrus Research plc

  • On the right track

    High-speed train manufacturer, CAF, rely on world-class beamforming technology to reduce the noise generated by their trains – helping to make high-speed trains a more viable option for travellers and operators alike. Because of its relatively low levels of CO2 emissions, train travel is considered one of the ...

  • North West Hotspots for Noise Nuisance Complaints [Infographic]

    Cirrus Research has been involved in an interesting project that looks at noise nuisance across the North West. Some of you might remember that we did a similar exercise last year for Yorkshire; this time around we went across the Pennines to see what kind of data we could retrieve from the ...


    By Cirrus Research plc

  • How does living with aircraft noise affect wellbeing? A study of UK airports

    Airports are associated with air and noise pollution and may, therefore, reduce the quality of life of local people. This study assessed the link between aircraft noise and subjective wellbeing, using data from 17 English airports. The authors conclude that living under flight paths has a negative effect on people’s overall wellbeing, equivalent to around half of the effect of being a ...

  • Creating an entire country`s noise map - Case Study

    To comply with the European Union’s Environmental Noise Directive 2002/49/EC, member states are required to create updated noise maps for large urban areas and major transportation sources every five years. The English government commissioned a single project to calculate sound levels across the whole of England which resulted in the world's biggest noise map. ...

  • Noise 101: What is Equivalent Continuous Sound Level (Leq)?

    For anyone that is measuring sound, you’ve probably come across the term Leq or Equivalent Continuous Sound Level. But what is it and how can it help us when measuring noise with a sound level meter? Setting the Scene Imagine you work on a busy construction site that is operating all day. You have diggers, cranes, trucks and other ...


    By Cirrus Research plc

  • How to manage Silence? A large scale noise management system

    Abstract Silence is the main noise management system for the Dutch highways and is used by the Dutch Ministry of Transport. The Silence system comprises IT infrastructure, environmental data, noise management software, an organisation, procedures and maintenance. Typical noise management system tasks involve data management, setup noise management software, software customisation, ...


    By Softnoise GmbH

  • Suzuki Wind Tunnel used for full-vehicle noise source identification case study

    The Suzuki name can be seen on a full range of motorcycles, automobiles, outboard motors, and related products and is recognised throughout the world for quality products offering both reliability and originality. And Suzuki is always creating advanced ‘value-packed products’ for their customers. So, in 2006, as one of their investments, Suzuki’s R&D division built a new ...

  • The man behind Africa’s growing digital democratization movement

    Tech guru Erik Hersman aims to change the world by changing information flow from “top down” to “all around.” Putting power into the hands of the people is, quite literally, Erik Hersman’s life’s work. With the help of mobile phone technology, open-source software and a team of socially conscious entrepreneurs, the ...


    By Ensia

  • Case study - Identifying low-frequency tonal noise in windy and noisy conditions

    Problem A large LNG gas facility (approximately 300m x 150m) producing 300 000 tons of LNG annually is situated in a terminal area with the nearest populated area at a distance of around 1 km. Within the gas production facility, a low-frequency tonal noise at around 500 Hz is generated causing complaints from nearby neighbours. The tone imposes a more stringent noise requirement on the ...


    By Norsonic AS

  • 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

  • Clutching At Straws to Come Up With Noise Level Solution

    The UK is renowned for its rich heritage in hosting outdoor festivals, whether it be music or literary, through to farming, food or catering to even more niche audiences. But every festival is unique and, no matter how large or small, they bring with them their own issues when it comes to health & safety and noise related ...


    By Cirrus Environmental

  • Canarina CUSTIC software · noise mitigation · commands 7

    The program window is a XY-plane (parallel to the land surface). A noise source is represented by a small square. In the Status bar at the bottom, we have X and Y coordinate values in meters and data on our environmental system. Point the mouse where you want in the program window and the X and Y values will be shown in the status bar at the bottom. On the left bottom corner, two different text ...

  • Canarina CUSTIC software · noise barrier modeling · barriers · introduction 4

    3. Noise pollution The word "noise" comes the Latin word "nausea" meaning Sea sickness. Noise is among the most pervasive pollutants today. Noise pollution can be caused by many sources including highways, vehicles, factories, engines, machine, aircraft, helicopters, industrial development and construction work. Noise negatively affects human health and well-being. Problems related to noise ...

  • Canarina CUSTIC software · noise impact assessments · introduction 2

    2. Administration and Environmental Impact The environmental administration is based on two fundamental tools:  the planning and the evaluation of the environmental impact. These two instruments are fundamental to coordinate the human activity and to maintain the quality of the environmental resources. The process of environmental planning combines the characteristics of each ...

  • Canarina CUSTIC software · impact analysis of noise · algorithms 7

       References Environmental Protection Department (2000) Housing Design to Abate Traffic Noise in Hong Kong, Environmental Protection Department, Hong Kong. Environmental Protection Department (2001) Screening Structures and Building Designs against Transportation Noise in Hong Kong, Environmental ...

  • 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: ...

  • Isuzu improve Diesel Engine Sound Quality

    In recent years, environmental issues have placed a big emphasis on vehicle emission and vehicle noise - including improved engine noise performance. It is becoming increasingly important not just to reduce the radiated sound pressure, but also to improve the sound quality of vehicles for the comfort of both passengers and local residents. In order to improve the perceived sound quality of diesel ...

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