portable sound level meter Articles

  • GKN aerospace success with portable impedance meter

    The GKN site in Cowes, Isle of Wight, UK, has long experience in the design and manufacture of passive sound insulation systems for air-intakes and by-pass ducts of aircraft engine nacelles. Dr. Armando Vavalle, Technology Development Engineer from GKN reports here on impedance tests conducted with Brüel &Kjær’s Portable Impedance Meter Type 9737 for the development of such ...

  • Measuring Static Water Levels Made Easier with Eno Scientific

    The Well Sounder 2010 PRO is a sonic water level meter, designed and manufactured by Eno Scientific, to measure static water level in wells, piezometers or boreholes. This portable handheld unit uses sound waves to measure the distance from the top of the well to the water level. This eliminates the need to lower anything into the well. Unlike standard water level tapes these acoustic meters are ...


    By Eno Scientific

  • Optimus and Invictus are the Classic Combination - Case Study

    Imagine a perfect summer’s evening with a 40-strong classical orchestra playing to an appreciative audience in a leafy green park. So far, so very English. Add in the fact the Park is in the heart of Lancaster city surrounded by thousands of homes and the orchestra is playing sets of the Hacienda’s classic 90s house music hits and you can understand the headache facing Acoustic ...


    By Cirrus Research plc

  • Ask Yourself These Questions Before You Buy a Granulator

    Ask Yourself These Questions Before You Buy a Granulator 1 WHAT DO YOU WANT TO GRIND? * Consider: Type of part or sprue/runner system, type of material (hard/soft, brittle/tough, filled/unfilled), and temperature of parts being granulated. * Determines: Rotor design, horsepower, sound attenuation, ...


    By Harden Industries Ltd.

  • Where to use Outdoor Noise Monitoring Equipment?

    Noise monitoring equipment is required for environmental noise applications that need to be monitored over a period of time and where a hand-held sound level meter taking on the spot noise measurements would not be suitable. Noise Monitoring Equipment from Cirrus Environmental The Invictus range can ...


    By Cirrus Environmental

  • Noise at Work Regulations: 10 Years On

    Doesn’t time fly? It’s already been 10 years since Control of Noise at Work Regulations were introduced in the UK. But have you been following the legislation correctly? Here’s an overview of what the Noise at Work Regulations mean and some common mistakes you should be avoiding. Considering that legislation to limit ...


    By Cirrus Environmental

  • RO monitors and Controllers: pros and cons

    A look at a range of devices for watching TDS. One major question a potential customer may ask before they purchase a point-of-use/point-of-entry (POU/POE) water treatment system is, “How often will I need to change the filter?” Maintenance and service are directly related to two of their major concerns: money and health. People don’t want to spend money unnecessarily, yet they ...


    By HM Digital, Inc.

  • What is Long Term Noise Monitoring?

    It might sound simple, but long term noise monitoring can mean different things to different people. There is no standard definition for what long term noise monitoring is, but here is a summary that covers the basics. I first presented this presentation at the IOA Eastern Branch meeting and wanted to share my thoughts on what classes as long term noise monitoring. I’ll also discuss ...


    By Cirrus Environmental

  • Demolition Noise Monitoring with John F Hunt - Case Study

    Cirrus Environmental has enjoyed a long alliance with John F Hunt Demolition going back over many years, so much so, the company’s Health, Safety & Environmental Department has accumulated almost an historic arsenal of Cirrus equipment that charts the journey of noise monitoring over the years. About John F Hunt Demolition The ...


    By Cirrus Environmental

  • A new DIRAC measuring speech intelligibility

    History   Speech intelligibility relates to the sound intensity modulations in the talker’s voice, as described by Houtgast et al. [1]. This principle is used to determine speech intelligibility from the remaining modulation at a receiver position, using a modulated noise source at the talker position. The noise spectrum represents that of a human voice, and modulations at ...

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