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

  • Designing that unique Ferrari sound using NVH Simulation

    Our NVH simulation technology enabled Ferrari to perform virtual evaluations of alternative design decisions in an interactive, free-driving scenario. Ferraris are distinguished by a unique sound that is as carefully tuned as a piece of music. Creating this characteristic sound authentically and yet keeping it within legal limits requires careful component design and selection. Our NVH ...

  • 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 ...

  • Regional geological recognition for the implementation of a urban geothermal concept

    A reflection seismic survey was performed in the city of Lausanne (CH) to map geological layers relevant to geothermal energy production. By using a wireless seismic system and a powerful seismic vibrator source we were able to high quality results despite the presence of elevated urban noise levels. The new subsurface maps allow the estimation of the geothermal potential for the city of ...


    By Geo2X

  • 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

  • Two Modified IEC 60318-4 Ear Simulators for Extended Dynamic Range

    The international standard IEC 60318-4 specifies an occluded ear simulator, often referred to as a 711-coupler, for testing headphones, earphones, hearing protectors, hearing aids etc. The standard specifies a specific microphone type which limits the dynamic range of the coupler both in the low range and in the high. To overcome these limitations, G.R.A.S. has developed two modified versions of ...

  • 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 ...

  • Romax Consultancy Services Provide Reliability Solutions for European Rail OEM - Case Study

    CAF MiiRA is a leading company in the design, manufacture and maintenance of railway wheelsets and their components. Currently, CAF MiiRA is the only manufacturer of wheels and axles capable of delivering the wheelset with a complete design: from the wheels, axles, axle boxes, and gearboxes. Mikel Oyarbide, Gearboxes Projects Engineer at CAF MiiRA, explains: “CAF offers comprehensive global ...


    By Romax Technology Limited

  • Noisy sites setting alarm bells ringing?

    Industrial sites such as refineries and factories will always be noisy, but with millions of people across the world occupationally exposed to hazardous noise, and noise-related hearing loss listed as one of the most prevalent occupational health concerns, what can be done about it? Arne Berndt, owner / adviser at SoundPLAN GmbH and SoundPLAN International LLC ...


    By SoundPLAN International LLC

  • How to test phones for noisy environments?

    Whether walking down a noisy street or talking on speakerphone, telephone users expect clear voice transmission. Sophisticated signal processing enhances human speech above background noise, but as there are different methods to test this capability, manufacturers cannot always be sure of the best one to use on their products. To identify the best approach, ...

  • Recording audio with level triggers - Sound Level Meters

    Recording audio from a sound level meter measurement is sometimes necessary. Perhaps you need to listen to identify the source of a noise or for post-processing – or even to play back to a project stakeholder. If a measurement is short, it’s easy enough to record audio for an entire measurement and afterward crop the relevant parts. However, measuring for days, weeks or months, ...

  • That air conditioner noise is annoying!

    The sound of the HVAC System in your office or factory may be annoying depending on who you ask; the person who has to live with it, or the person who has to pay for it. To measure background noise levels objectively, we use Noise Curves. International standards organizations (ISO, ANSI and ASA) recognize the need to objectify judgements on the amount of ambient noise in enclosed ...


    By NTi Audio AG

  • 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

  • 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

  • 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

  • MapAtWork - an efficient tool for making contour maps for workplaces

    General purpose interpolation software has an overkill of functionality for making a simple contour map based on measurements. MapAtWork and NolseAtWork software will significantly reduce the time you would normally spend on getting your maps done. The Bio plotter I started at DGMR in 1981 as acoustic consultant. At that time there was no software available for making nice ...


    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 ...

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you