On the 6 February 2003 the European Parliament issued the new Physical Agents (Noise) Directive 2003/10/EC. This repeals the existing Noise at Work Regulations 1989 and must now be complied with.
|The aim of the regulations is to reduce the risk of hearing damage for employees, requiring the reduction of the noise at source where possible and the provision of hearing protection were necessary.|
The noise action levels are based on a worker's daily personal exposure level or LEP,d. You may also see this referred to as the LEX,8h. To calculate the LEP,d you need a suitable sound level meter. Please see the notes later in this document for more information.
|Lower Action Level||LEP,d = 80 dB(A)
Peak = 135 dB(C)
|Make individual hearing protectors available to workers. Training and information on the risk of hearing damage and on hearing protection must be given to workers.|
|Upper Action Level||LEP,d = 85 dB(A)
Peak = 137 dB(C)
|Reduce the noise at source where reasonably practicable. Provide suitable hearing protectors and ensure that they are worn. Employees must be provided with information and training about the use of the protectors.|
|Exposure Limit||LEP,d = 87 dB(A)
Peak = 140 dB(C)
|Under no circumstances shall the exposure of the worker (taking into account hearing protection worn) exceed these limits.|
The notes here are relevant to all sound level meters from any manufacturer, not just those supplied by Noise Meters Limited.
The HSE guidance on the Noise at Work Regulations booklet Controlling Noise at Work states that "...the sound level meter should be an integrating sound level meter..." . Although some choose to use a non-integrating meter where the sound pressure level is steady for long periods, most professionals would recommend the use of an integrating sound level meter as this takes away any uncertainty as to what "steady for long periods" means and deals perfectly with the usual situation of varying noise levels.
The sound level meter should be capable of measuring:
You must also have a suitable sound calibrator for the sound level meter. This is used to check the correct operation of the meter before and after making any measurements.
The guidance also states that you should use at least a Type 2 or Class 2 sound level meter to BS EN ISO 61672-1:2003 or BS EN 60804:2001. You can choose the more accurate Type 1 if you prefer or if you have other measurements that demand the higher grade. You should never use a meter that does not meet these standards to at least Type 2 as it will not satisfy the regulatory authorities.
These are small devices, similar to sound level meters, that you attach to the worker at the start of the working shift and leave it measuring that person's exposure until the end of the shift. This approach is ideal when the worker is highly mobile or working in a place where access for noise measurement is difficult.
A Dosemeter or PSEM may not always give a reading that is as accurate as a sound level meter due to the mounting of the microphone on certain types of dosemeter and the uncontrolled nature of the measurements. However, any errors tend to increase the exposure level measured, which is far better than getting false low levels. The more modern dosemeters that do not require the microphone to be clipped to the worker's lapel also reduce these errors.
Although we have a very large range of meters available that can be used for this application, the instruments that follow are the ones that we recommend and are also the most cost effective.
|Order Code||Description and Application|
|CEL620||Integrating Sound Level Meter with Upgrade Options
This version of the CEL Sound Level Meter was designed specifically for noise at work applications. In its standard form it is suitable for most occupational noise surveys. Data logging and octave band filter options make this a very powerful meter.
|CEL246||Low Cost Integrating Sound Level Meter
This is our lowest cost noise at work sound level meter, designed specifically for this type of application. It measures the A weighted Leq. All you have to do is press Start to begin measuring and Stop when finished. This meter does not measure Peak and so is not suitable for assessing loud banging noises.
The ultimate Noise Dosemeter. It is small, lightweight and has no cable to the microphone, which is mounted on the unit to reduce the errors that can be introduced when a microphone is clipped onto the worker's collar or lapel.
All of these instruments are available with a sound calibrator. Please visit the product pages for more information and pricing details.
Even though you must have a sound calibrator, the regulations also demand that the sound level meter (and calibrator) are sent to a suitably equipped laboratory for testing and calibration at least every two years. A new instrument should always be provided with a calibration certificate.
For anybody involved in occupational noise measurements in the UK, the HSE's book Controlling Noise at Work is essential reading. It covers all aspects of the subject, from assessing the risk and reducing the noise to the provision of suitable hearing protectors. This book is available from HSE Books (Tel. 01787 881165) and is reference L108.
There are a number of very useful (and free) HSE leaflets that can be downloaded from http://www.hse.gov.uk/pubns/noisindx.htm.
If you want any advice on the selection of the right sound level meter then please just call on 0845 680 0312 or send an email to us at firstname.lastname@example.org.