acoustic testing 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

  • Isolating Energy in the Wind Tunnel

    Wind tunnels, used for aerodynamic and acoustic testing in the automotive and aerospace industries, use one or more electrically driven fans to push or pull air through a test section. Air will either recirculate through a closed loop or be drawn in from the surroundings from one end of the tunnel and exhausted out the opposite end. Around the wind tunnel, there are several full body access ...


    By Kirk Key Interlock Company

  • 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 ...

  • Dynamic blast compaction of some granular materials: small-scale tests and numerical modelling of a mining-related problem

    Sub-Level Caving (SLC) is an important mass mining method, involving blasting of ore against granular material in the form of caving debris. The debris compaction due to blasting influences the caving process. Blasting tests were made on cylinders of magnetic mortar placed inside plastic cylinders and confined by packed granular material. By introducing the acoustic impedance between the mortar ...


    By Inderscience Publishers

  • Recreation Management – Problem Solver: Control Noise in your Natatorium or Gym

    Natatoriums and gymnasiums often play host to multiple types of programs. But with inherently poor acoustics, the noise level becomes a nuisance. The right attention to engineering and design can ameliorate the problem. Q: We're building a natatorium and would like to host multiple types of events, but we're concerned about the acoustics. What should we know? A: The typical materials ...


    By Eckel Industries Inc.

  • Acoustic emission source localisation on bone using multiple regression

    A regression source location algorithm is developed to locate microcracks in bovine bone samples. Bone samples measuring 60 mm long, 22 mm wide and 5.5 mm thick were harvested from bovine femora. Artificial acoustic emission sources were created on the bone samples. The known location of these acoustic emission sources and the recorded arrival times at four acoustic emission sensors were used to ...


    By Inderscience Publishers

  • The evaluation of speech intelligibility in a simulated driving environment using the hearing in noise test

    The implementation of the hearing in noise test (HINT) was carried out using an NVH driving simulator in order to evaluate the speech intelligibility in a car between driver and passenger for a variety of driving speeds and the configurations of the talker and of the listener. The sentence reception threshold (sSRT) was determined for each of the various communication situations. When presented ...


    By Inderscience Publishers

  • The influence of combined environmental stimuli on the evaluation of acoustical comfort: case studies carried out in an interactive simulation environment

    In automobiles, the perceived acoustical comfort is dependent on the vibro-acoustic exposure. To meet the customers' demands, acoustic engineers are asked for the optimisation of the vehicle's noise and vibration at early stages of the development. However, the task can only be adequately carried out if the interaction of noise and vibration and its impact on drivers' evaluations are well-known. ...


    By Inderscience Publishers

  • Saline Pond Multi-Layer Liner System - Case Study

    Gas operation benefits from the conversion of a single-liner system to a double-liner with leak detection monitoring Extensive gas operations near the North Saskatchewan River in Fort Saskatchewan, Alberta, are understandably closely regulated. To help the client remain well above compliance requirements and expand their leak detection capabilities, Nilex implemented the ...


    By Nilex

  • Modified log-normal particle size distribution in acoustic spectroscopy

    The modified log-normal distribution is a smooth continuous distribution depending on four parameters: median size, standard deviation, minimum size and maximum size. This distribution introduced by Kottler [J. Franklin Inst. 250 (1950) 339] and Irani [J. Phys. Chem. 63 (1959) 1603] gives an opportunity to restrict the particle size range. This distribution is asymmetrical on the logarithmic ...


    By Dispersion Technology Inc.

  • Case study - Plains Midstream– Alberta, Canada

    Service: SmartBall - Oil Leak Detection Client: Plains Midstream Canada Project Date: May 2008 Type of Pipeline: Crude Diameter: 8-inch Length: 8,000 meters Results: 2 simulated leaks created and detected As small as 0.0025gals/min Plains Midstream selected SmartBall ahead of other technologies for their pipeline leak ...

  • In-situ noise level mapping for vehicle floor carpet

    Noise level mapping of test vehicles' floor carpets was undertaken for three frequency bands, that is, low-(2,000 Hz) to compare noise control treatment performance and effectiveness. On-road tests including idling conditions and constant speed tests of 40, 60 and 80 kph were undertaken. Noise level contour maps indicate that the luxury class test vehicle ...


    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

  • Monitoring nanoparticles in the presence of larger particles in liquids using acoustics and electron microscopy

    Monitoring the presence of nanoparticles in dispersions having broad particle size distributions can be a problem for many measurement techniques because large particles or even aggregates of the smaller particles can mask the presence of the sought after nanoparticles. The ability of many existing techniques to detect the nanoparticles when present in broad polydisperse systems is largely ...


    By Dispersion Technology Inc.

  • Case study - El Paso Water Utilities (EPWU)

    Service: Robotics Client: El Paso Water Utilities (EPWU) Project Date: June 2005 Type of Pipeline: Transmission Main Diameter: 24-inch Pipe Material: Lined Cylinder Pipe (LCP) Length: 0.64 miles The City of El Paso is the fifth largest in Texas, with a population of approximately 750,000. To serve the needs of this burgeoning city, El Paso Water Utilities (EPWU) operates ...

  • Let’s Clear Up Some Things About Distortion…

    'Distortion' is an important characteristic of audio components and is often stated in the product specifications for speakers, amplifiers and other audio and acoustic devices. Unfortunately terminology is often used incorrectly or important additional information is omitted. In this article we aim to provide clarity of the concepts and measurement methods and their proper use. ...


    By NTi Audio AG

  • Importance of Indigenous Solutions for Underwater Defence

    On 19 September 2018, Professor Hayrettin KÖYMEN, one of the leading researchers in underwater acoustics in the World, gave a talk at the Kudenfor forum on the ‘Latest Paradigms in Underwater Acoustics and Sonar Technologies’’. One of the key takeaways of the talk was that since the 1960s, the acoustic research in the world was not public and has been kept secret from ...


    By Hoytek

  • Top 10 posts of 2015 on Pulsar noise measurement blog

    Our noise measurement blog is just over a year old. During that time, we have doubled our readership which now includes hundreds of colleagues, customers and distributors (and competitors!) around the world who read our weekly posts. It has been a great experience for all involved to share the latest ...


    By Pulsar Instruments Plc

  • Rapid detection of sewer defects and blockages using acoustic-based instrumentation

    Sewer flooding incidents in the UK are being increasingly associated with the presence of blockages. Blockages are difficult to deal with as although there are locations where they are more likely to occur, they do occur intermittently. In order to manage sewer blockage pro-actively sewer managers need to be able to identify the location of blockages promptly. Traditional closed-circuit ...


    By IWA Publishing

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