sound test Articles

  • Does my site, house, or flat need a sound test? Sound Insulation Testing requirements.

    Approved Document E:  Resistance to the passage of sound’ governs the sound testing requirements for newly built, and refurbished dwellings, as well as newly-built and refurbished ‘rooms for residential purposes’ (e.g. hotels, student accomdation) constructed since 2003.  (link here: ...


    By Acoustic Tests

  • The Basics of Sound Theory and Testing Principles: A Brief Guide for Environmental Professionals

    As awareness of environmental noise pollution grows, environmental professionals not specifically trained or experienced in the field of acoustics or noise control are being increasingly called upon to assess, predict,and/or quantify sound emissions from a variety of industrial sources. This article provides an overview of basic acoustical fundamentals, including the frequency ranges of primary ...

  • Hydrostatic Pressure Test

    A hydrostatic test is performed to determine the integrity and soundness of pressure vessels and piping joints. A decrease in the applied pressure or leakage through the products or joints or plastic deformation or distortion or bulging in the product is indication of inadequate quality of the product under test.   This test method is also termed as Leak testing (based on ...

  • 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.

  • 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 ...

  • MIRA utilise PULSE Sound Power Software for EU compliance

    MIRA is a leading automotive design, development and certification consultancy providing a wide range of European certification and homologation services for automotive and non-automotive customers, as well as conducting tests which are accepted for national approval in many countries worldwide. They provide Automotive Type Approval services for automotive legislation (“e” marking) and also ...

  • 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 ...

  • Evaluation of the Drop Bar Test for Concrete and Rock Quality

    The bearing capacity of rock foundations is being determined by the sound produced by impacting the foundations with a steel bar. This paper evaluates the sound and stress produced. Instrumenting the steel drop bar extends the capabilities of the test and makes the test less subjective. The steel bar produced a characteristic ringing sound when the specimen´s unconfined compressive strength was ...


    By ASTM International

  • 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, ...

  • Recycling plant for automotive sound proofing case study

    Challenge: Increased demand from customers for a recycling solution to handle off-cuts from processing of Niko products. Existing plant not effective at separating granulated foam/sheet particles. Niko Coatings unable to offer satisfactory recycling service to customers. Axion Solution: Separation trial on Axion's ...


    By Axion Group

  • Are Those Inexpensive iPad Sound Measurement Apps Any Good?

    Are those inexpensive iPad sound measurement apps any good? Are they as accurate as a properly calibrated $2,000 type 2 sound level meter? Let's review three separate studies, and an article: Study #1 In early 2014, NIOSH reviewed 192 sound measurement apps. NIOSH concluded, ...

  • A Sound Projector for Acoustic Tomography and Global Ocean Monitoring

    Abstract—Long-range underwater acoustic systems, such as those used in ocean acoustic tomography, require low-frequency signals covering a broad frequency band. To meet this requirement, a novel design based on of a tunable narrow-band high-efficiency sound projector has been exploited. The projector transmits a frequency sweep signal by mechanically tuning a resonator tube (or organ pipe) ...

  • Inalfa - production testing of sunroof systems

    Production Testing of Sunroof Systems Sound and vibration are growing in importance as critical factors in product quality. Therefore, manufacturers are required to perform noise and/or vibration quality testing prior to shipping a product. The proper implementation of such a test is a significant challenge – one that can offer a very large return on investment. To address this ...

  • Clean your test sieves to maintain accurate results

    A standard process in analytical laboratories is sieve analysis, the practice of accessing the particle size distribution of a granular material. The trouble is, sieves prove quite the challenge to clean thoroughly enough to get all the contaminants out of the mesh. Every last grain stuck in the sieve must be removed to gain accurate analysis. A solution has been found in the use ...


    By Camlab Limited

  • Application of the American Society of Testing and Materials’ (ASTM) New Skimmer Test Protocol

    Abstract The American Society of Testing and Materials (ASTM) subcommittee on skimmers recently adopted a standard methodology for measuring the nameplate capacity for a given skimmer system. Current industry practice allows manufacturers to label skimmers with a nameplate capacity that may bear little relationship to the ability of the skimmer, as a system, to recover oil. Manufacturers ...


    By OHMSETT

  • 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 ...

  • Vibrations can have both negative and positive effects on the perception of sound

    In a listening test participants were asked to rate their impression of product sound quality of truck sounds combined with steering wheel vibrations. The set-up also contained stimuli where one of two harmonics in the sound was suppressed, corresponding to the most salient peaks in the vibration spectrum. Sound and vibrations were rated as more annoying, tiring, rumbling and of lesser quality ...


    By Inderscience Publishers

  • Pulsar Sound Level Meter Achieves Germany’s PTB type approval

    A Great Start to 2017 Pulsar Instruments Plc, leading manufacturer of occupational noise measurement products, has announced that the Model 45 Class 1 Sound Level Meter from its flagship Nova series has just received regulatory type approval from the ...


    By Pulsar Instruments Plc

  • Case study - Wall leakage testing in the lab with acoustic camera

    Problem Facade insulation testing is usually performed by using a loudspeaker in the sending room, and record the sound pressure level (SPL) with microphones in both the sending and receiving room. The difference in SPL adjusted for the size of the dividing wall element will then give an estimate of the sound reduction quality of that element. However these measurements will not say ...


    By Norsonic AS

  • Hwy 60 test, Lodi, Wisconsin

    It’s hard to find Civil & Environmental Engineering Professors Craig Benson and Tuncer Edil behind their desks. You have a better chance of locating them on a construction site, actively participating in the task at hand. They prefer to teach through hands-on lessons, like those found in their groundbreaking soil stabilization research efforts. Benson and Edil are currently involved in two major ...


    By Presto Geosystems

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