real-time sound measuring Articles

  • Measurement Uncertainty in Environmental Noise Measurement

    Any measurement is meaningless without an uncertainty or tolerance associated with it. All measured numbers contain errors, and as such have an associated uncertainty. Disturbing as it is to an engineer, it is actually not possible to measure anything exactly. One definition of uncertainty is “A parameter, associated with the result of a measurement that characterizes the dispersion of the ...

  • First short-term noise monitoring system for airports launched

    Airport Noise Monitoring On Demand increases flexibility for investigation, compliance or planned changes Brüel & Kjær today announced the release of Airport Noise Monitoring On Demand, a system that enables airports to temporarily - and cost-effectively - increase noise monitoring when needs arise. This system helps airports measure ...

  • On the right track

    High-speed train manufacturer, CAF, rely on world-class beamforming technology to reduce the noise generated by their trains – helping to make high-speed trains a more viable option for travellers and operators alike. Because of its relatively low levels of CO2 emissions, train travel is considered one of the ...

  • Netherlands’ Mobile Emergency Pumps Provide Rapid Flood Response

    The Western European nation has 20 mobile diesel-driven pumps on standby, ready to assist in national and international emergencies. One of the smallest and most densely populated countries in Western Europe, the Netherlands has nearly 10 million residents who live and work below sea level. Without active water management and primary flood defenses, ...


    By BBA Pumps

  • BBA Mobile Emergency Pumps Provide Rapid Response for Floods

    Netherlands’ Mobile Emergency Pumps Provide Rapid Flood Response In its latest edition, the North American PUMPS & SYSTEMS magazine publishes an in-depth article featuring the history and current usage of emergency mobile pumps. The Western European ...


    By BBA Pumps

  • 100 Simple Ways To Save Water

    To improve water conservation install a rain sensor, it turns off your irrigation when it rains. Use a weather-based controller. The use of smart controllers can reduce water usage 24% a year on average. Learn about available rebate programs ...


    By Jain Irrigation, Inc

  • 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, ...

  • Noise, sound, decibels, hearing

    A decibel–a measure of sound. Like all short answers, this one leaves out a lot. When we hear a sound, its because our brain has received a nerve impulse from the nerve cells in the Inner Ear, which consist of a bone, called the Cochlea because it resembles a snail shell. These cells have long “hairs” that project into fluid inside the cochlea. There is a hole in the cochlea ...

  • Biofuels not as green as they sound

    Untitled Document EEB Position Paper on the Draft Directive on the promotion of the use of biofuels for transport and the Draft Directive amending Directive 92/81/EEC with regard ...

  • Tackling Office Noise – The Sound Investment

    Open offices or shared offices can offer great benefits in terms of communication but they can also present challenges. We’ve all had problems with noise in the office - the incessant chatter of your colleagues ruining your concentration; people shouting over you when you are trying to have a conversation on the phone; perhaps even maintenance or construction work going on next door. ...


    By Pulsar Instruments plc

  • Sustainability: Time to Get in the Real Game - The sustainability victories we are claiming these days are still marginal to the core work of the world.

    “Corporate sustainability reporting is dead.” Not the words of a anti-corporatist radical green — but of Peter Bakker, president and CEO of the World Business Council for Sustainable Development, on stage ...


    By Ensia

  • Support to Aviation Control Service (SACS): an online service for near-real-time satellite monitoring of volcanic plumes

    Volcanic eruptions emit plumes of ash and gases into the atmosphere, potentially at very high altitudes. Ash-rich plumes are hazardous for airplanes as ash is very abrasive and easily melts inside their engines. With more than 50 active volcanoes per year and the ever-increasing number of commercial flights, the safety of airplanes is a real concern. Satellite measurements are ideal for ...

  • Noise Measurement

    Definitions Threshold and criterion levels The threshold level is the A-weighted sound level at which a personal noise dosimeter begins to integrate noise into a measured exposure. For example, if the threshold level on a sound level meter is set at 80 decibels (dB), it will capture and integrate into the computation of dose all noise in the employee's hearing zone that equals or exceeds 80 dB. ...


  • What is a Data Logging Sound Level Meter?

    Looking to buy a sound level meter? You’ll probably see the term “data logging sound level meter” quite frequently. But what exactly is a data logging sound level meter and what does it mean for your noise measurements? Sound level meters have come a long way since Cirrus starting manufacturing their own models in the 1970s. The advances in computing technology has made it far ...


    By Cirrus Research plc

  • Sound Absorption for All Saints Church Community Centre

    Acoustic specialists, Sound Reduction Systems (SRS Ltd) were approached by All Saints Church with a view to treating the poor acoustics within their community centre. They had recognised that high levels of reverberation and echo were affecting the various groups that used the space, and were looking for a solution that was both effective and decorative. Initially, Mr Les Munns (Church Building ...


    By Sound Reduction Systems Ltd

  • What to look for when buying a sound level meter

    Sound level meters: a matter of class  Since sound level meters, or slm's were invented, they have existed in various grades of accuracy.  Today, accuracy is referred to as 'Class' and the reason behind all this rests with the ...


    By Pulsar Instruments plc

  • Listening In: Smartball Detects Ancient Buried Sounds

    For this leak detection survey, Pure’s innovative free-swimming acoustic tool gathered critical information about the aging pipeline assets of this historic Arabian city. This large public utility supplies bulk water to this bustling, historic resort city located in the Arabian Penninsula region. The city’s infrastructure – above ground and below – ...


    By Pure Technologies

  • A Guide to Noise Measurement Terminology

    There are 100s of different acoustic parameters that can be used during your noise measurements. Each parameter can tell you something different the noise you’re monitoring. How do you remember what all this noise measurement terminology means and what it does? We’ve already covered ...


    By Cirrus Research plc

  • Noise 101: What is Equivalent Continuous Sound Level (Leq)?

    For anyone that is measuring sound, you’ve probably come across the term Leq or Equivalent Continuous Sound Level. But what is it and how can it help us when measuring noise with a sound level meter? Setting the Scene Imagine you work on a busy construction site that is operating all day. You have diggers, cranes, trucks and other ...


    By Cirrus Research plc

  • How Often You Should Calibrate A Sound Level Meter

    Do you calibrate a sound level meter frequently? Most sound level meter users know they must calibrate their sound level meters but a questions I frequently get asked if “how often?” Here’s my best practice advice so you can calibrate with confidence. What Do We Mean by Sound Level Meter ...


    By Cirrus Research plc

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