sound profiler Articles

  • MASW and resistivity sounding case study

    Anclote Natural Gas Conversion Project, Pasco County, FL  Our client was coordinating the conversion of an oil-burning power plant to natural gas. As part of the associated geotechnical study, GeoView, Inc. was tasked with determining the S-wave velocity and vertical resistivity structure at the site. For the seismic portion of the study, MASW (Multi-channel Analysis of Surface ...


    By GeoView, Inc.

  • Sound field diffusivity at the top surface of schroeder diffuser barriers

    It has been shown in several studies that the T-shape profile barriers are one of the most successful noise barriers among many different profiles (May and Osman 1980; Hajek and Blaney 1984; Hothersall et al., 1991). In this case, it is shown by author (Monazzam and Lam, 2005) that in the same dimension, the T-shape profile has the highest performance compared to other profiled noise barriers. It ...


    By University of Tehran

  • Impact of sound attenuation by suspended sediment on ADCP backscatter calibrations

    Abstract. Although designed for velocity measurements, acoustic Doppler current profilers (ADCPs) are widely being used to monitor suspended particulate matter in rivers and in marine environments. To quantify mass concentrations of suspended matter, ADCP backscatter is generally calibrated with in situ measurements. ADCP backscatter calibrations are often highly site-specific and season ...


    By Teledyne RD Instruments

  • Major Hydrographic Survey Using Valeport rapidSV Profiler - Case Study

    A major Hydrographic Survey in the Bering Sea off northwestern Alaska has just been successfully completed using the Teledyne/Oceanscience rapidCAST profiling system using the Valeport rapidSV profiler. As reported in Hydro-International recently (see full article), the ...


    By Valeport Ltd

  • Flow Profiling on Demand – Illuminating the reservoir with Silixa’s intelligent Distributed Acoustic Sensor (iDAS) and ULTIMA Distributed Temperature Sensor (DTS)

    As energy demands increase rapidly, the goal of energy companies is to maximize ultimate recovery in an economically sound manner. One critical capability is the accurate measurement and monitoring of production from individual layers / perforated intervals in a multi-zone completion. This data allows operators to optimize zonal production, improve recovery, increase production per well and ...


    By Silixa Ltd

  • Multivariate statistical analyses of idle noise and vehicle positioning

    Principal component analysis (PCA) and correspondence analysis (CA) are applied to characterise the differences in engine idle noise and market position analysis. The first principal component represents overall sound pressure level (SPL) showing general noise level and the second principal component as SPL at low frequencies between 25 Hz and 50 Hz. Principal component scores are used as a way ...


    By Inderscience Publishers

  • An Inertial Measurement Unit Application for a GPR Tracking and Positioning

    Abstract Abilities of an inertial measurement unit (IMU) for ground penetrating radar (GPR) tracking and positioning are presented at this paper. The IMU operation principle is based on calculating of the device's orientation in space via measurement of linear accelerations and angular velocities. Features of the IMU, GPS and wheel odometer are compared. Principal scheme of the IMU consisted ...


    By Transient Technologies LLC

  • White paper - RaMPS technology explained

    1. Introduction RaMPS, which stands for Resistivity Mono-pole Profiling and Sounding, is a unique and proprietary geophysical survey and exploratory methodology developed by Willowstick Technologies by combining traditional resistivity sounding and profiling techniques into an integrated surveying method. It is not only unique in the way the data is acquired, but unique in the way the ...


    By Willowstick Technologies LLC

  • Simple model of the Urban Atmospheric Boundary Layer (UABL)

    The horizontally homogeneous atmospheric boundary layer over a rough surface with a large roughness length z0 has been investigated to model the simplest cases of the Urban Atmospheric Boundary Layer (UABL) over a flat plain. It has been demonstrated that the nondimensional profiles of the horizontal Reynolds stresses of eddy viscosity and of velocity defect components are universal and ...


    By Inderscience Publishers

  • Electromagnetic detection of a 410-km-deep melt layer in the southwestern United States.

    A deep-seated melt or fluid layer on top of the 410-km-deep seismic discontinuity in Earth’s upper mantle, as proposed in the transition-zone ‘waterfilter’ hypothesis, may have significant bearing on mantle dynamics and chemical differentiation. The geophysical detection of such a layer has, however, proved difficult. Magnetotelluric and geomagnetic depth sounding are geophysical methods ...


    By Hargis + Associates Inc

  • Evaluation of inversion strengths and mixing heights during extremely stable atmospheric stratification

    We have compiled data from Finnish sounding stations and classified the inversions according to their total depth and the stability of the boundary layer. We studied the persistence of the inversions and the influence of cloudiness and wind speed on the temperature gradient. Additionally, we addressed the specific problems of an urban area, using measurements from a meteorological mast situated ...


    By Inderscience Publishers

  • The process and mechanism of urban environmental change: an evolutionary view

    This paper discusses how an evolutionary viewpoint can contribute to the understanding of the processes and mechanisms of urban environmental change. There are four major components in the urban environmental evolution concept: (a) cities can be viewed as complex systems that are subject to constant change, which constitutes a dynamic evolutionary process; (b) urban environmental profiles of ...


    By Inderscience Publishers

  • Basic tests for checking validity of field data

    The following guidelines are suggested for verifying micrometeorological data gathered in field experiments. It is assumed, for simplicity, that the observations being tested are made over open, relatively flat and uniform terrain, with small roughness elements. It is also assumed that the sensors and the data acquisition and recording hardware are basically sound and that the purpose of the ...

  • U.S. - China renewable energy partnership

    In the fall of 2010, a team of engineers carefully installed an unusual, six-foot high enclosure on a windy plain some 200 miles northwest of Beijing. Inside the gray casing – which looks a bit like a giant rabbit from some angles – is a sensitive device that uses sound waves to measure wind speeds hundreds of feet up into the sky. It’s called the Triton Sonic Wind Profiler, and ...


  • ‘Kyoto cost’ of various production and recycling processes

    ‘Kyoto cost' of various production and recycling processes: An interesting take on the the total CO2 emissions released during the lifetime of various containers used in the manufacturing and delivery of bottled water and other fluid products typically consumed in North America ...


    By Baum Publications Ltd.

  • Does traditional calibration hide errors in your demand analysis?

    Untitled Document A well-calibrated water distribution model can address numerous ...


    By Innovyze

  • Mastering the “Black Art” of Manipulating Modeling Parameters

    Matt White, Senior Wastewater and Drainage Modeler at Earth Tech advises fellow modelers to invest time in calibrating their models.  Calibration is the most important phase of any sewer flow modeling exercise, but is often neglected, says Earth Tech’s Matt White. Poorly calibrated models can have a significant impact on the costs of the modeling process, but just as important, the accuracy ...


    By Innovyze

  • Sonic booms – environmentally friendly?

    JAXA and Brüel & Kjær Join Forces to Measure Sonic Booms Brüel & Kjær and JAXA join forces in a research project to measure sonic booms. Side-by-side with JAXA’s ABBA sonic boom system, Brüel & Kjær’s PULSE LAN-XI based data acquisition and analysis system is used to study the effects of sonic booms on buildings. When ...

  • Mapping a better future: How spatial analysis can benefit wetlands and reduce poverty in Uganda

    Drawing on Uganda’s rich baseline of wetland data and poverty mapping, this report provides a detailed examination of the links between ecosystem services and the location of poor communities and presents practical lessons for policy-makers across government. Uganda has abundant natural wealth. Its varied wetlands, including grass swamps, mountain bogs, seasonal floodplains, and swamp ...

  • Optimus and doseBadge Adapt to New Challenge - Case Study

    Established in 1934, Lindapter International is the world’s innovator of steelwork clamping systems, eliminating the requirement to drill or weld steel.  The company designs and manufactures specialist products for connecting structural steel sections together and  has more than 85 years’ experience in its field. The company’s success is the result of its dedication ...


    By Cirrus Research plc

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