Noise levels from fireworks – a very unscientific measurement!
This year, Bonfire Night (5th November for anyone who doesn’t know) fell on a Saturday this year and despite the forecast of rain, myself and my colleagues Gill Cussons, Justin Barker and Nigel Palmer braved the weather with the aim...
Noise Induced Hearing Loss – An Introduction
There are over an estimated 9 million hard of hearing individuals in the UK (source: Action On Hearing Loss (RNID), 2005 survey). The overwhelming reasons for hearing loss are listed as being age-related and noise-related, very much in-line with other...
What are First Octave and Third Octave Band Filters?
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.
What is a Class 1 Sound Level Meter?
A Class 1 Sound Level Meter is a noise measurement instrument that meets the requirements of IEC 61672-1:2002 (or an equivalent such as BS EN 61672-1:2003) to Class 1 performance. Tolerances & Accuracy This standard specifies two levels of performance,...
Cirrus Research is now offering a 15 year warranty on its noise measurement equipment
Cirrus Research is delighted to announce that it is now able to offer a 15 year warranty on its noise measurement equipment including its award winning Optimus Green sound level meter. The reliability and strength of Cirrus Research products is...
Cirrus Research : Home grown innovation
For over 40 years specialist noise measurement equipment manufacturer, Cirrus Research, has been designing, manufacturing and providing ongoing support for its high quality noise measurement instruments in the UK. Over the past decades, a flurry of companies have opted to...
Whatโs the Difference Between a Class 1 and Class 2 Sound Level Meter?
Weโve 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?
You need a sound level meter, but what for?
In my 10 years experience as an Export Sales Manager, I am often approached for a Sound level meter with little additional information as to the intended use of the instrument. Sound level meters come in a range of different...
What is the Difference Between Class and Type for Sound Level Meters?
The sound level meters and noise dosimeters that we manufacture are designed to meet the performance criteria laid down in various standards. For example, the Optimus sound level meters are designed to meet the requirements of BS EN 61672-1:2003 which...
