Contact | Distributors | Search
0845 230 2434 (UK)
+44 1723 891655 (Int)
sales@cirrusresearch.co.uk
www.cirrusresearch.co.uk
We’ve added 3 new dates for in 2012 our Cirrus Product Training Courses (CPTC).
These are:
Wednesday 14th March 2012
The East Midlands Conference Centre
Thursday 29th March 2012
Castle Combe Circuit
Wednesday 4th April 2012
Oulton Park Circuit, Cheshire
Wednesday 11th April 2012
Brands Hatch Circuit, Kent
For more information, click here or visit our website at www.cirrusresearch.co.uk/training
We have a new job vacancy at Cirrus, an IT Supervisor.
Reporting to the Managing Director, this role requires taking full operational responsibility for the company’s IT infrastructure and to provide IT support and development across our group of companies.
The ideal candidate should be self-motivated and should be comfortable presenting to small groups of internal staff, be personable, self-organised and able to meet deadlines. Continue reading »
Noise from Fireworks
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 of measuring the noise levels at our local fireworks displays.
We didn’t set out any rules as to where these measurements should be made other than that they should be from within the spectators and should be representative of the noise exposure that people would get. Continue reading »
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 Western world countries. The big difference is that while age-related hearing loss is a natural process that we can do little about, the same cannot be said for noise-induced hearing loss.
Why Does Noise-Induced Hearing Loss Happen
The ear
A critical part of the inner ear is the cochlea which houses thousands of tiny ‘hair cells,’ responsible for sending signals via the nerve fibres for the brain to interpret as sound. Prolonged exposure to high-volume noise can cause these hair cells to die, resulting in hearing loss. Once the hair cells are damaged, any resultant hearing loss will be permanent as these hair cells are unable to regenerate. When talking about noise-induced hearing loss, two main factors contribute to the level of hearing loss:
It is never too late to try to prevent hearing loss due to noise exposure. At the work place, areas that have sounds exceeding 85dB (decibels) will need to be the target of noise reduction controls.
Preventing Noise-Induced Hearing Loss
Reducing and preventing hearing loss caused by exposure to noise at the workplace was introduced as a government target in 1989 under the ‘Work Regulations act of 1989’. New legislation introduced in 2005 and enforced from 2006 placed yet more emphasis on preventing hearing loss in the UK’s industry. It clearly states that employers have a duty to prevent or reduce risks to employees from exposure to high levels of noise at work. Continue reading »
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.
These bands usually have a bandwidth of one octave or one third octave. More advanced instruments may be able to give a narrow band analysis of the noise data. This may be an FFT (Fast Fourier Transform) or information in 1/12 octaves. Continue reading »
Our new eBook “Q&A – The top 10 posts on our blog” is now available for download.
Throughout 2011 we’ve been posting information and answers to questions from our customers, distributors and sales team on our blog at cirrusresearch.co.uk/blog.
This book contains the top 10 posts that you, our customers, have been reading and commenting on. Some of the posts have been expanded with some additional information and links where appropriate. Some of the posts on the blog cover similar topics and so we’ve also combined some of these posts into one to cover a subject more widely.
Click on the image below or click here to download the new FREE eBook.
Top 10 Blog Posts - November 2011
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, Class 1 and Class 2, with Class 1 being effectively more accurate. Within the standard are a set of performance criteria that an instrument must meet and each of these has a tolerance associated with it. The tolerances for Class 1 are tighter than for Class 2. For example, at the reference frequency of 1kHz, the tolerance limits for Class 1 are +/- 1.9dB and for Class 2 the tolerance is +/- 2.2dB. Continue reading »
15 Year Warranty from Cirrus Research plc
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.
Cirrus Research offers its customers a full support package for each of its products, including a newly extended 15 year warranty, continued customer support and free expert advice. Continue reading »
We’ve covered the differences between Class and Type in sound level meter standards in a previous post and so in this post we’ll cover the differences between a Class 1 and a Class 2 sound level meter.
The standards that we work to, such as IEC 61672-1:2002 or BS EN 61672-1:2003, define a wide range of performance criteria that the instrument must meet. These criteria are often quite technically complex and detailed and have tolerances associated with them. In the current standard, IEC 61672-1:2002, there are two levels of tolerance and these are known as Class 1 and Class 2. Continue reading »
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 such that the company is providing this new extended warranty to any acoustic instrument manufactured by Cirrus Research from 1st September 2011 onwards.
Under the terms of the new scheme, Cirrus Research’s standard two year warranty can now be extended by a further 13 years at no additional cost; that is provided the instrument is routinely verified by Cirrus Research every year. The warranty covers all faults on the instrument, as well as minor accidental damage, excluding the microphone. Continue reading »
Cirrus Research plc | Acoustic House | Bridlington Road | Hunmanby | North Yorkshire | YO14 0PH | United Kingdom
Tel: +44 1723 891655 | Fax: +44 1723 891742 | Email: sales@cirrusresearch.co.uk
©Copyright 2010 Cirrus Research plc
