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Latest Noise News

How to measure noise from £30 a day with noise hire

How You Can Measure Noise For Less

Found the perfect noise measurement equipment only to find it’s outside of your budget? Our Noise Experts have the ideal solution. Noise Hire gives you our industry-leading products from just £30 a day.

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5 Biggest Noise At Work Mistakes

5 Biggest Noise At Work Mistakes

You’ve been told you have to complete a Noise At Work Risk Assessment. There’s all the Regulations for you to read through. A plethora of potential instruments to choose from. Endless choices to make. And all that’s before you even start…

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Karaoke microphone

Why Why Why – No Delilah?

Christmas might be a bit quieter this year for some Lancashire residents after noisy neighbours were stripped of their karaoke machine by Noise Nuisance officers.

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Recommended By Our Noise Experts

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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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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

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NoiseTools is now compatible with Windows 8.

A new version of the NoiseTools software is available that is compatible with the new Windows 8 operating system.
Version 1.4.4 of NoiseTools can be downloaded from the Cirrus website or updated from within NoiseTools itself.

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PTB Type Approval for the optimus sound level meters

We are delighted to announce that the optimus red and optimus green sound level meters have been Type Approved by the PTB in Germany!

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Tonal noise analysis with the 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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