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 âpure toneâ). This is referred to as tonal noise.
Archive | Noise Measurement
New dates for our Product Training Workshops
Due to high demand, we’ve added a new set of dates for our Cirrus Product Training Workshops. The latest dates are: Thursday 29th March 2012, Castle Combe Circuit, Wiltshire Wednesday 4th April 2012, Oulton Park Circuit, Cheshire Wednesday 11th April 2012, Brands Hatch Circuit, Kent Wednesday 20th June 2012, Park Avenue Hotel, Belfast Tuesday 10th July 2012, Brands Hatch Circuit, Read More…
New noise measurement case studies
We’ve added some new case studies to our website. These cover the use of some of our most popular products including the optimus red, optimus green and the dosebadge noise dosimeter. You can view these at www.cirrusresearch.co.uk/library/case-studies/ Why not stay up to date with what’s new from Cirrus? Just sign up for our newsletter or subscribe to our blog and Read More…
Lights, camera, action!
Are you a budding photographer? Then enter now for the Cirrus Research 2012 ‘Noise in Action’ photography competition Cirrus Research, an expert in noise measurement, has launched its 2012 ‘Noise in Action’ photography competition to help raise money for its 2012 charity of choice, Hearing Dogs for Deaf People. Cirrus Research is looking for interesting, unusual and imaginative images of Read More…
How loud was the Superbowl? 107dB(A)!
Sunday night was the 46th Superbowl played between the New York Giants and the New England Patriots at the Lucas Oil Stadium in Indianapolis, Indiana. The National Institute for Occupational Safety & Health (NIOSH) who are based in Atlanta, Georgia set up a Twitter stream (#noiselevel) and asked anyone who was at the game to measure the noise levels using Read More…
Enter our 2012 Noise in Action Photography Competition
We’re looking for interesting, unusual and imaginative images of Noise in Action to feature in the calendar. This could be anything from an image of our products being used in obscure or picturesque places to a photograph creatively illustrating noise, noise measurement or the impact of noise. The first prize is a £150 Amazon voucher with the image featured on the Read More…
Influences of weather, damage and ageing on the performance of outdoor microphone windshields
Windshields fitted to outdoor measuring microphones serve a dual purpose – to reduce wind-generated noise, and to protect the delicate microphone from damage by environmental factors such as rain, ice and dust. However, the presence of a windshield inevitably affects the directional and frequency responses of the measuring system. This paper presents results of measurements on the directional and frequency Read More…
Motorbike exhaust sound levels for track and race days – An overview from a rider
As a motorbike track day enthusiast and rider myself, I have friends regularly asking me for advice when it comes to what is the maximum sound level their bike exhaust noise level can be. When I reply with the question, “what circuit are you racing at?” they seem surprised that this is relevant and that I was unable to provide Read More…
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 of measuring the noise levels at our local fireworks displays. We didn’t set out any rules as to where these Read More…
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 Western world countries. The big difference is that while age-related hearing loss is a natural process that we can do Read More…