We’ve had a question that has been asked through our Blog form (the Do you have a questions box on the right) and the question is:

“How we can calculate average for a large data (e.g.24 hours data records of per second each) after downloading multiple files from the meter.

Simple averaging can be produced will not represent the level of energy of a record. For example, 45, 46, 48, 43, 78, 79, 71, 33, 55 levels, the simple arithmetic average would be 55.3.

But the energy level of noise for 78, 79 and 71 is high compared to other values so how can we calculate the average now?“.

This is an interesting question and one that we get asked quite frequently.

There are some applications where you would use a simple linear average to calculate a value from noise measurements but these are few and often very specific. Continue reading »

As we move into 2013, we’re looking forward to another busy year at Cirrus.

Throughout the year we’ll be presenting our sound level meters, noise dosimeters and environmental noise monitoring equipment at a number of trade shows and exhibitions and below is a list of those that we’re currently attending as an exhibitor.

If you’re planning on visiting any of these, let us know and we’d be pleased to see you.

IOSH 2013, February 26th 2013, Excel, London, UK

Safety & Health Expo, May 14th 2013, NEC, Birmingham, UK

AIHce , May 18th 2013, Montreal, Canada

ASSE 2013, June 24th 2013, Las Vegas, USA

Internoise 2013, September 15th 2013, Innsbruck, Austria

NSC Congress & Expo, September 30th 2013, Chicago, USA

These exhibitions are an ideal opportunity to meet with our sales team and to find out what’s new at Cirrus.

We’d also recommend that you subscribe to our blog as we’re about to start a new series of posts covering the most common noise terminology and parameters.

We’ve had a number of requests from both existing customers and visitors to our blog where they’ve asked us to explain what a particular term means or what a parameter on their instrument shows.

Over the next few months we’ll be covering the most common of these so if you’ve got any questions let us know and we can add it to the list! You can use the “Do you have a question” form on the right.

If you’d like to stay in touch with updates and news from Cirrus, just sign up for our newsletter using the form on the right side of this page, call us on 0845 230 2434 or email sales@cirrusresearch.co.uk

From all of us at Cirrus, we would like to wish you a prosperous and successful 2013.

Throughout 2012 we’ve posted  information and answers to various questions from our customers, distributors and sales team on our NoiseNews blog.

The Top 10 blog posts have now been collated from the most popular read by our customers and website visitors and we’ve made this into a book for  you to download.

Over the past year, the blog has seen an impressive number of visitors, with a staggering 18,875 people reading the numerous postings!

These blog posts explains the different types of equipment from Cirrus Research, including information on frequency weightings, class and maintenance etc.

Other examples from the Top 10 list includes an introduction to noise induced hearing loss and ways to avoid this.

The top blog post posed the question “What are Octave and Third Octave on a sound level meter?” with an impressive 3,161 readers eagerly looking for the answer.

James Tingay, Group Marketing Manager at Cirrus Research comments: “The NoiseNews blogs are a great platform for our customers to communicate with professionals about noise measurement equipment.” He continued to say, “We are also delighted to see such a large number of people visiting and reading the Cirrus Research blogs.”

To view the Top 10 blog posts in full go to: http://cdn.crplc.com/documents/Top-10-Blog-Posts-Issue-2.pdf

One of the commonly asked questions that we have is “I’ve got a new PC. Will the Cirrus software program X work?”.

There are many different versions of Windows in use and we still see customers using Windows 2000 or even 98SE. Our current software programs, NoiseTools, Deaf Defier3, dBLink, Noise-Hub and the SoundSign software will work with most recent Windows operating systems as long as you have the correct drivers and have installed the latest version. Continue reading »

start

A new version of the NoiseTools software is available that is compatible with the new Windows 8 operating system which is released toady, 26th October 2012.

Version 1.4.4 of NoiseTools can be downloaded from the Cirrus website or updated from within NoiseTools itself.

Click the Help, Check for updates menu and follow the on screen instructions.

Continue reading »

A new version of the NoiseTools software is now available.

For existing users, we would recommend upgrading using the update function built into NoiseTools. Click  Help and then Check for Updates. Follow the on screen updates for details.

You can also download the updates for NoiseTools directly from the Cirrus Research website. Click here to download the latest update.

What’s new in NoiseTools

This update of NoiseTools contains a number of new features including:

  • Enhancements to the periodic noise calculator
  • Markers can be removed from the periodic noise calculator
  • Single Period for periodic calculator
  • Simplified Chinese translation added
  • Improved download speed and stability
  • Additional settings for CK:680 Outdoor noise measurement kit
  • Added support CR:19xBE optimus
  • Several user interface improvements.
  • Various minor bug fixes.

Learn how to get the best from your Cirrus noise measurement instruments and stay up to date with what’s new from Cirrus.

Our product training courses have proven to be very popular over the past few years and to meet demand we’ve added some new dates for 2012.

These courses are the ideal opportunity for users to find out how to get the best from their instruments and to ask questions about how to best make a noise measurement. It’s also a good time to ask questions specific to your application and to discuss with other delegates any topics of interest.

Here are the courses that are booked for 2012:

Wednesday 26th September 2012
Brands Hatch Circuit, Kent

Friday 5th October 2012
The East Midlands Conference Centre

Wednesday 31st October 2012
Oulton Park Circuit, Cheshire

Thursday 8th November 2012
Castle Combe Circuit, Wiltshire

Thursday 22nd November 2012
Brands Hatch Circuit, Kent

Here are a few comments from previous courses:

 Excellent presentation

 Very informative course

 ..excellent value for money, well communicated at a good pace

 ..very useful, delivered in a relaxed, easy manner

If you’d like more information about the courses, please call Craig Storey on 01723 891655. You can book a place online at www.cirrusresearch.co.uk/training or by calling 01723 891655.

Hearing Dogs for Deaf PeopleThroughout 2012 and 2013, our chosen charity is Hearing Dogs for Deaf People which has a direct association with the industry that we are involved in.

Hearing Dogs for Deaf People is a national charity and centre of excellence in training hearing dogs to alert deaf people to everyday household sounds and danger signals in the home, work place and in public buildings.

Hearing Dogs was launched at the world famous Crufts dog show in 1982. Since then we have created over 1,600 life-changing partnerships between deaf people and hearing dogs in the UK. There are currently over 750 working partnerships in the country.

Join in and support

You can help us support Hearing Dogs for Deaf People in a number of ways. You can donate directly through their website or you can enter our Noise in Action Photography Competition.

The winners of the competition will be featured in our 2013 calendar with all proceeds being donated to the charity. This calendar will be on sale in late 2012 so there’s plenty of time to enter and win.

We will also be holding a competition at the 2013 Safety & Health Expo in aid of Hearing Dogs for Deaf People.

You can find out more on the website at http://www.hearingdogs.org.uk/

 

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

The Class 1 CR:171 (optimus green) and Class 1 CR:161 (optimus red) sound level meters have been type approved by the PTB to the latest standards for sound level meters, DIN EN 61672, which is the same as IEC 61672.

The Physikalisch-Technische Bundesanstalt (PTB) is the German National Metrology Institute and is recognised as one of the most prestigious national test laboratories in the world.

After a series of long and detailed tests, which include both electrical and acoustic verification, approval numbers have been issued for the Class 1 optimus green and optimus red instruments as follows:

CR:161A, CR:161B & CR:161C
CR:1710, CR:171A & CR:171B

The approval numbers are:

21.21 / 12.02 for the CR:171 series (CR:1710, CR:171A & CR:171B)

21.21 / 12.03 for the CR:161 series (CR:161A, CR:161B & CR:161C)

The standards that were used in the verification were:

DIN EN 61672-1: 2003-10: „Elektroakustik – Schallpegelmesser – Teil 1: Anforderungen“
DIN EN 61672-2: 2004-08: „Elektroakustik – Schallpegelmesser – Teil 2: Baumusterprüfungen“
DIN 45657: 2005-03: „Schallpegelmesser – Zusatzanforderungen für besondere Messaufgaben“

What is Type Approval?

Type Approval, or Pattern Approval, is a method where a test laboratory such as the PTB tests an instrument against a set of standard tests to ensure that it meets the performance claims of the manufacturer.

The optimus sound level meters have been designed to meet the requirements of IEC 61672 (and the corresponding EN and DIN standards) and so these independent test have been carried out to verify that that the instruments do indeed meet these requirements. The IEC 61672 standard is in three parts.

The first of these is known as Electroacoustics – Sound level meters – Part 1: Specifications  and this defines the performance specifications for the instruments.

Part 2 is known as Electroacoustics – Sound level meters – Part 2: Pattern evaluation tests and this defines the tests and checks that a laboratory must carry out when they are testing an instrument for Type or Pattern approval. These are the tests that the PTB have been carrying out on the optimus sound level meters.

Part 3 is known as Electroacoustics – Sound level meters – Part 3: Periodic tests  and this defines the tests that should be carried out during a Periodic or routine verification.

This post has more information about the different sections of the IEC 61672 standard.

 

 

 

Calibration News Issue 4The latest issue of our calibration newsletter is available for download.

We’ve covered some of the common questions asked by our customer including

  • Introducing our “no quibble” warranty
  • Traceable Calibration & UKAS Calibration
  • Get to know the Cirrus team
  • Top Tips
  • Sending your equipment back to Cirrus

If you would like to receive  information or details about our calibration services, let us know and we would be delighted to help.

You can call us on 0845 230 2434 from the UK (8.30am to 4.30pm) or +44 1723 891655 from outside the UK. You can also use the form on this page if you would like to email us directly.

© 2013 NoiseNews