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Latest Noise News

noise action week - tackling neighbourhood noise nuisance

Noise Action Week 2016: Tackling Neighbourhood Noise Nusiance

May 23rd – May 28th 2016 is Noise Action Week. As we’re dedicated to noise measurement, it’s certainly something we’re keen to promote. So, here’s an overview of what Noise Action Week is all about, how you can get involved and ways of dealing with neighbourhood noise nuisance.

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It's Coming...20 Years of Evolutionary Success

doseBadge® – 20 Years of Evolutionary Success

In 1996 Cirrus pioneered the first doseBadge Noise Dosimeter. 20 years later and we are preparing to launch the fifth generation.

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the noise doctor with an optimus sound level meter

Ask The Noise Doctor: How Long will the Batteries Last in My Optimus Sound Level Meter?

Do you have questions about noise measurement that Google or Wikipedia just can’t seem to answer? Ask The Noise Doctor. I’ll be giving answers to our most frequently asked questions and in this article I’ll be covering battery life in the Optimus Sound Level Meter range.

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Recommended By Our Noise Experts


What are Octave and Third Octave Band Filters on a Sound Level Meter?

When more detailed information about a complex sound is needed, the frequency range of 20Hz to 20kHz can be split into sections or bands. This is done electronically within a sound level meter.

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a sound level meter to IEC 61672 standard

What’s the Difference Between a Class 1 and Class 2 Sound Level Meter?

We’ve covered the differences between Class and Type in sound level meter standards in a previous post but what the differences between a Class 1 and Class 2 sound level meter?

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What are A, C & Z Frequency Weightings?

On your sound level meter or noise meter you will often see references to Frequency Weightings such as ‘A’, ‘C’ or ‘Z’.

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Cirrus Product Updates

noisetools version for windows 10

NoiseTools is Now Compatible with Windows 10

A new version of the NoiseTools software, version v1.5.3, is now available for download and is fully compatible with the new Windows 10 operating system. Here’s your guide to downloading the latest version of NoiseTools on local and networked systems.  Read More »

enter the world of vibration monitoring with cirrus research

Enter a New World with Cirrus Research

Cirrus is evolving. We want to make safety at work easily achievable for everyone. That’s why we’re entering into the world of vibration with the launch of the Revo™ Vibration Meter. Join us on our journey.

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Tonal Noise Analysis with Optimus Green Sound Level Meters

Often the sound energy from a noise source will be spread over a wide band of frequencies. Sometimes a noise source will emit noise that is concentrated in a narrow part of the spectrum or contains a high proportion of energy at a single frequency (a “pure tone”).  This is referred to as tonal noise.

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