noise absorption Articles

  • 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 ...

  • A numerical structural-acoustic approach to analysis of interior booming noise and noise reduction in an all-terrain tractor cabin

    The booming noise in an all-terrain tractor cabin is studied in this research via a numerical structural-acoustic approach. Cavity acoustic resonances of the cabin are evaluated, and the acoustic resonant frequencies are identified and quantified in the research. The noise level inside the cabin is determined, and the frequencies characterised by peak noise levels within the booming noise ...


    By Inderscience Publishers

  • NASA acts to reduce crawler transporter noise

    The United Space Alliance sought outsideassistance to evaluate and develop noise controlmeasures for NASA’s two CTs at KSC aspart of a modernisation and upgrading program.NASA selected Noise Solutions Inc. (ageneral acoustical contractor) and their subcontractorFaszer Farquharson & Associates ofCalgary, Canada to engage in this project. Thefirst phase of the sound study ...

  • Low level moisture measurement in Natural gas using a Lunable diode laser absorption spectroscopy (tdlas) based laser case study

    Introduction The measurement of water vapor in natural gas has long been of industrial importance, and has been addressed by a variety of analytical techniques over the years. Chief among these techniques has been the quartz crystal microbalance (QCM) based analyzers. The QCM technology is still the workhorse for production and pipeline applications, and the technique is considered by most ...

  • Position Paper on the European Strategies and Priorities for Railway Noise Abatement

    Untitled Document Executive Summary Railway noise can be reduced considerably in the ...

  • The Universal Sampling Accessory

    Infrared Spectroscopy (IR) is one of the most descriptive “tools” available to the analytical organic chemist both for qualitative identification and quantitative determination of single and mixed components. Classically, most samples have been prepared for scanning by transmission, where the thickness becomes a very critical factor in the quality of the final spectrum. If the sample is too ...


    By Buck Scientific Inc

  • Pump up the volume

    On April 6 the Control of Noise at Work Regulations 2005 will come into effect for any licensed premises or venue offering amplified music entertainment. Tim Turney, Product Manager with Casella CEL which manufactures noise measuring and dose meter technology takes a quiet look at the noisiest industry in town.When the smoking ban came into effect last June many clubs and pubs held a ‘farewell to ...


    By Casella

  • The precision, accuracy, and reproducibility of IRGASTM systems

    Problem Statement What is the precision, accuracy, and reproducibility of an FTIR instrument? A seemingly relatively easy question with a not so relatively easy answer. Unfortunately, there is no straight-forward answer to this question, and the answers that there are can get complicated and confusing. Hopefully this application note will give some insight into signal/noise ratio, standard ...


    By CIC Photonics, Inc.

  • An overview of post-column derivatization methods from a pharmaceutical applications perspective

    High performance liquid chromatography (HPLC) is the technique of choice for separating analytes pursuant to their detection, identification, quantification and/or purification. Most organic substances, and certainly the majority of pharmaceuticals, are polar, nonvolatile or thermally labile molecules that are amenable to HPLC separation. Moreover, the availability of a large variety of LC column ...


    By Pickering Laboratories, Inc.

  • Analysis of the chemical form of iron in water pipes using XAFS measurements

    Yellow and red metal oxides are commonly found on deteriorated water pipes and it has been reported that their main component is iron. X-ray absorption fine structure (XAFS) spectroscopy is an effective method which can be used to measure the chemical form of metals. However, when the iron concentration in water samples is extremely low, XAFS measurement and analysis can be difficult due to so ...


    By IWA Publishing

  • Research & development of sound quality in lifts

    The Consortium Orona S. Coop. (manufacturer of lifts), Mondragon Goi Eskola Politeknikoa (MGEP) S. Coop. (Engineering Faculty of Mondragon University) and Ikerlan S. Coop. (Research Centre) have formed a consortium and established a stable working group of engineers to investigate the Sound Quality in Orona’s lifts. MGEP, Ikerlan and Orona MGEP, the ...

  • From a trucker’s seat – the American eream comes true!

    With its high focus on interior noise testing programs, Commercial Vehicle Group (CVG) gains competitive advantages in a market where driver comfort is not only an essential, but also a vital safety issue as well as a tool to improve driver retention. For its vibration and acoustic test programs, Brüel & Kjær is CVG’s preferred supplier of accelerometers and microphones as ...

  • Beer`s law

    The Beer-Lambert relationship (or Beer's law) states that the concentration C is directly proportional to the absorbance A. Generally, this relationship is more often applied by comparing the height of a maximum absorption peak of a reference gas to the height of the corresponding peak in a sample spectrum. However, this technique suffers if the baseline is not accurately known, and it fails ...


    By CIC Photonics, Inc.

  • The determination of major and minor elements in air filters and urine for hazard assessment, using a new CCD DUAL-VIEWED ICP optical emission spectrometer

    This article describes the application of a new type of CCD-based, dualviewed ICP optical emission spectrometer for the analyses of industrial hygiene types of samples. Several trace elements in air filter media are determined by ICP-OES. Urinary electrolytes and trace elements are determined in a single dilution automatically in both the axial and radial plasma viewing orientations. Results of ...


    By PerkinElmer, Inc.

  • Automotive Development and Progress in HORIBA`s Emission Measurement Technologies

    The progress in HORIBA's emissions measurement systems has been closely connected to trends in vehicle development. Innovations in automotive technology, stemming from emission regulations and implementation of computer control systems, have especially had great influence on analytical technologies. With the advent of emission regulations, HORIBA developed its first automotive emission analyzer, ...


    By HORIBA Europe GmbH

  • Solution of entrap phenomenon of Gear Pump

      As for gear pump, in order to work smoothly, the gear meshing of the coincidence degree must be greater than 1, so there are always two pairs of gears mesh at the same time, and some of the ...


  • Enhanced acoustic material testing in a tube

    Demands from the Industry   A growing number of customers demand quieter vehicle cabins, and cabin acoustic comfort has become a major concern for the automotive industry. Optimization of the acoustic insulation performance has, therefore, been given a more prevalent role in the design process. In the aircraft industry, acoustic comfort for customers and the use of new, lighter ...

  • How PPE Makes Mining Industry Safe and Secure

    Work-related health and safety has always remained a cause for concern among industry experts, managers and workers. Many industries like energy, construction, fishing and farming report high incidence of casualties. The potential hazards that miners face daily in their workplace are plenty. Many of these hazards have progressive consequences that are not realized until too late. The effects ...


    By KWRS

  • Why measuring the ambient NO2 without conversion?

    Nitrogen oxides NOx are pollutants that may have particular impact in terms of greenhouse gases, acidifying air etc ... issuance increased significantly since 1950 with the massive development of transport and industries. It therefore becomes necessary to provide measures always safer these pollutant gases, and to know the reliability of results. Currently, 60% of emissions of NO and NO2 are ...


    By Environnement S.A

  • Gas Monitoring for Ventilation Control and Energy Management

    The growing demand for underground and enclosed parking and maintenance garages (resulting from limitations on land availability) has increased the awareness and need for proper ventilation and control systems. In addition, increased health and safety programs have only added to the concerns of toxic and combustible gases in confined or enclosed spaces. Historically, ventilation and make-up air ...


    By Arjay Engineering Ltd.

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