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Latest Noise News

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UK Music Venues Under Threat

Are noise nuisance complaints choking the life out of UK’s small music venues? There is a ongoing debate so between campaigns and Defra.

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The Noise Doctor

Hello, I’m The Noise Doctor

Remember me? Yes, I’m The Noise Doctor. I’ve been away having a makeover but I’m back and ready to fight those deadly Decibels. Want to find out all about me and how I can help you? Read this blog post.

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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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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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