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Latest Noise News

What is reverberation time and how is it measured?

What is reverberation time and how it is calculated?

What is the reverberation time of a room? Reverberation time is the time required for the sound to “fade away” or decay in a closed space. Sound in a room will repeatedly bounce off surfaces such as the floor, walls, ceiling, windows or tables. When these reflections mix, a phenomeon known as reverberation is created. Reverberation reduces when the reflections Read More...
Calculate Reverberation Time with the NoiseTools RT Module

Calculate Reverberation Time (RT) with the new NoiseTools Module

Introduction to the Reverberation Time Module We’re pleased to announce the release of our new NoiseTools extension module which allows for the calculation of reverberation time in accordance with ISO 3382-2:2008. Using information measured using a suitable Optimus Sound Level Meter, the module allows the calculation of RT60, RT30 and RT20 values from either an interrupted or impulsive noise source. The module also Read More...
What’s the difference between echo and reverberation?

What’s the difference between echo and reverberation?

This is a question that we get asked quite regularly, especially from customers who are coming across the measurement of reverberation for the first time. I recently came across a simple, clear explanation that was written by Harout Taghilian who is an Acoustic Consultant at Ramboll. Harout wrote: A lot of people are confused about the difference between reverberation and Read More...

Recommended By Our Noise Experts

Visit Cirrus Research on stand 06C51 at A+A 2017

Visit Cirrus at A+A 2017 and see the new doseBadge5 Noise Dosimeter

Cirrus Research will be presenting a number of new and exciting additions to the existing range at the A+A Exhibition in October 2017. On Stand 6C51 will be the new doseBadge5 Noise Dosimeter and the Optimus Sound Level Meters, which together provide a complete solution for both occupational and environmental noise measurements.

Read More...
4-Biggest-Vibration-at-Work-Mistakes

4 Biggest Vibration at Work Mistakes…and How to Fix Them [Free eBook]

You’ve been told you have to complete a Vibration 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 measuring vibration exposure. How do you do it, avoid all the common mistakes and comply with the Regulations?
dosebadge5 noise dosimeter

The NEW doseBadge5 Noise Dosimeter Has Arrived

The new generation of the doseBadge® Noise Dosimeter has arrived. It was launched at the Safety & Health Expo 2016 in London’s ExCel (21st to 23rd June 2016) on Stand Q2050. Here’s a look at how the doseBadge5 will help you monitor occupational noise exposure.

Read More...

Cirrus Product Updates

What is AuditStore and how dows it work?

[Tutorial] What is AuditStore and How Does it Work?

AuditStore is a technology that is unique to the Cirrus Optimus sound level meters (and variants such as the Trojan Noise Nuisance Recorder) that helps you to verify that the noise measurement data the you present is trustworthy.

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Cirrus Optimus LNE Approval to the new sound level meter standards

LNE Type Approval to IEC 61672-1:2013 & IEC 61260:1995 for the Optimus Red & Optimus Green

We’re pleased to announce that the Class 1 Optimus Green and Class 1 Optimus Red Sound Level Meters have passed the latest round of Type Approval Tests and have been certified as meeting the latest version of the sound level meter standard, IEC 61672-1:2013 (and the corresponding NF EN 61672-1:2014 publication). The instruments have been tested and certified by the LNE, Read More...
dosebadge5 noise dosimeter

The NEW doseBadge5 Noise Dosimeter Has Arrived

The new generation of the doseBadge® Noise Dosimeter has arrived. It was launched at the Safety & Health Expo 2016 in London’s ExCel (21st to 23rd June 2016) on Stand Q2050. Here’s a look at how the doseBadge5 will help you monitor occupational noise exposure.

Read More...