Occupational Noise Survey

occupational-noise-surveyConstant workplace occupational noise exposure to manufacturing noise can lead to industrial deafness.

Constant exposure to manufacturing noise exposure can lead to industrial deafness. Site noise levels need to be compared to 2 criteria.

If noise exposure levels are over the criteria, workers require hearing protection and must suit the site current noise levels.  A sites noise level can vary from one operation to the next and a site occupational noise survey will allow a you to see the nosiest equipment and process.

Occupational Matters Occupational Noise Consulting Service

Occupational Noise Surveys and noise testing is one of our main consulting services.  Noise Surveys begin with an expert occupational hygienist completing occupational noise sampling with Class 1 sound level meter & with a dosimeter worn by operators recording the workplace occupational noise levels.  The occupational hygienist’s focus is to identify the occupational noise exposure levels by a combination of static and personal sampling at the site.

A survey is required by the WHS Regulation 2011 if onsite noise levels exceed 80 dBA.  A  safety manager should during the year perform spot checks of the occupational noise exposures onsite.

Occupational legislation and Australian Standards noise exposure limits are:

•8 hour shift must be below 85 db(A); and,

•Loud knocks/bangs must be limited to 140 db(C).

The protocols of the AS/NZS 1269 Occupational noise management are implemented by an occupational hygienist are to identify, assess and control the risk of noise induced hearing loss.  Hearing protection equipment may be only necessary in only one operation and if added to all areas may  reduce workplace efficiency.

Occupational Hygienist Onsite Service will perform:

An occupational hygienist fits personal dosimeters to operators to measure the noise levels over an the shift and then compared to appropriate occupational noise criteria.  The dosimeters are worn for 4 hours or longer for the sites main operations.  The Australian Standard outlines a mandatory 4 hour dosimeter recording  to assess the average noise exposure level for a shift.

Static sampling gives an accurate assessment of exposure levels in a particular area. A sound level meter provides an area ‘worst-case’ scenario  measurement to find out if that area is a hazardous zone.  Precautions have to be considered in the case where employees have to occasionally enter or operate in this area.  The static measurements taken by the sound level meter will consist of a total of at 5 to 10 static areas or machinery noise sources for each operation area chosen by the client.  To assess the operators for noise exposure, the surrounding noise sources are measured to identify the main sources of occupational noise exposure from the site operations.  A Class 1 sound level meter is used to measure both A and C weighted band widths.

A occupational noise survey  taking a large number of noise level measurements in a grid formation provides a contour map. Excess noise sources and effects of reflecting surfaces adds to the sites everyday noise sources.  Hence, an occupational noise survey with a contour map will allow you to predict if site machinery requires maintenance. As a result a map will highlight  if machinery is adding noise  and resulting  higher operation noise exposure levels.


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