Noise Risk Assessments

Using the latest equipment and Institute of Acoustics certified competent assessors HSMC can provide a detailed noise survey / noise assessment for your site.

Our noise survey / noise assessment includes:


Type 1 noise measurement

Noise meters commonly come in two 'Types'. Type 2 is the minimum standard for assessments which are in compliance with the Noise Regulations. Type 1 is the 'gold standard', offering greater levels of accuracy and reliability.

Average noise exposures including personal dosemeters

HSMC will measure the noise received by your employees and will provide the noise measurement results required to fully comply with the noise risk assessment sections of the Control of Noise at Work Regulations. This includes Leq, Lep,d, Peak levels, etc. (and we will tell you in English what these mean practically for you).

Dosebadge used in HSMC noise risk assessmentWe have two methods for doing this, firstly the hand-held units provide logging data which allows us to plot the noise levels each second for both general noise and the complete octave range. This way we can accurately measure noise levels across workplaces. The second is the personal dose monitoring which is done with several wearable dosemeters in the form of metal 'badges'.

Pulsar 30 unit used by HSMC in noise risk assessment

After downloading to the main unit the pattern of the noise exposure experienced by the wearer is provided in the form of a graph, along with the actual noise exposure for the period monitored.

Octave Band Noise Analysis

In addition to the overall or total noise levels, we provide a breakdown of the noise into its component frequencies. Why do you need this? Hearing protection such as muffs or plugs offer varying levels of protection at different frequencies therefore providing an analysis of the frequency levels allows selection of the appropriate hearing protection.

Peak Sound Pressures

Some noises are sharp, fast percussive sounds and in these instances the peak sound pressure is important.

Employer's Noise Survey / Noise Assessment Report

All HSMC noise assessmen reports include the following as standard:

  • Possibly the most commonly read section - a plain-language management summary of the overall noise assessment findings, to-the-point detail of where it is loud and a synopsis of what you need to do about it.
  • Average sound exposure values and all personal dosemeter results.
  • Identification of noise peaks and the values they reached.
  • Octave band sound analysis for all areas in excess of 85dB(A).
  • Comments and recommendations on the hearing protection which is appropriate for the noise risks you have, including verification of your existing hearing protection if suitable as required by the Noise at Work Regulations.
  • Recommended noise reduction measures - an Action Plan based on the findings and observations from the noise assessment.

Octave band analysis of levels in noise assessment Noise assessment dosebadge

We have heard of noise assessment companies who have been told they need a 'noise map' of their workplace meaning many hundreds or even thousands of measurements and subsequently an astronomical bill for clients. THIS IS NOT TRUE - don't spend more on this than you need to. Noise assessments should be focused on personnel and their jobs or tasks rather than on the workplace itself, after all, its the people you are looking to protect from the effects of noise.

HSMC offers a complete noise management package and in addition to assessing the noise risk we can advise on noise reduction measures and can fulfil any occupational health needs, using in-house expertise and a mobile audiometry studio.



Environmental noise and surveys for Building Regulations

HSMC specialises in workplace noise exposure for the purposes of risk assessment under the Control of Noise at Work Regulations 2005. Unfortunately we are unable to offer noise surveys for environmental nuisance purposes, e.g. noisy neighbours, noise from a process causing disturbance to residential areas, etc. as this is a separate discipline from workplace noise measurement. This is also the case for surveys being conducted for building regulation approval measuring factors such as noise transmission between floors and walls, etc.

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