OMB Decision on Haul Routes July 26, 2017
On July 24th the OMB released a decision on the Giofam City application in Kawartha Lakes.
Agricultural System and Natural Heritage System Consultation July 18, 2017
The OMAFRA and the MNRF have posted the proposed Agricultural System in the Greater Golden Horseshoe and the proposed criteria, methods and mapping for the Natural Heritage System in the Growth Plan area for public comment on the Environmental Registry.
RFP Opportunity for Hydro-One July 18, 2017
Hydro One Networks Inc. and its affiliates ("Hydro One") are preparing to release a Request for Proposal ("RFP") on or around August 1, 2017 for two categories of Construction Materials.
Changes to Aggregate Fees & Royalties July 18, 2017
Please be advised that Cabinet has now approved amendments to Ontario Regulation 244/97 under the Aggregate Resources Act (ARA) to make changes to aggregate fees and royalties.
Fall 2017 Aggregate Resources Course at University of Waterloo July 17, 2017
The course covers a variety of topics related to aggregate resources and planning including geology, economics, licencing, site plans, rehabilitation, and more.
Minister Meets with OSSGA July 7, 2017
Just after she gave the welcoming speech to attendees at the Rehab Symposium, MNRF Minister Kathryn McGarry took time to meet with Board members at the University of Guelph last week
A Primer on Hearing Protection July 5, 2017
One form of controlling noise hazards is through the proper use of hearing protection devices (HPDs). Hearing protectors should be provided when engineering controls cannot be implemented or while such controls are being initiated.
Community Relations Award – Lafarge Canada Inc. July 5, 2017
Caledon Pit takes community relations to heart both on- and off-site. On the site, noise, dust and safety mitigation equipment and practices help minimize the effects of its operations on neighbours. Off-site, staff are familiar faces at community events.
MNRF Will Not Increase Aggregate Fees and Royalties on July 1, 2017 June 16, 2017
The Ministry of Natural Resources and Forestry has issued a notice to all licence holders under the ARA with respect to aggregate fee and royalty increases that were proposed to begin July 1, 2017.
Bank Swallow Research at Pits and Quarries in Eastern Ontario June 15, 2017
Nature Canada is seeking industry participation in their bank swallow monitoring project.

BackOSSGA News

A Primer on Hearing Protection

July 5, 2017 at 1:20 PM

Hearing Protection

One form of controlling noise hazards is through the proper use of hearing protection devices (HPDs). Hearing protectors should be provided when engineering controls cannot be implemented or while such controls are being initiated.

Hearing protective devices are barriers that reduce the amount of noise reaching the sensitive inner ear. Fit, comfort, and sound reduction or “attenuation” are important considerations in choosing HPDs.

Commonly used hearing protection devices are either earplugs or earmuffs. Earplugs attenuate noise by plugging the ear canal. The muff-type protector is designed to cover the external part of the ear providing an “acoustical seal”.

Effectiveness

Obviously, the effectiveness of an HPD depends on the amount of time it is worn. What is not obvious to most wearers is the drastic reduction in protection if HPDs are not worn in noise environments even for short periods of time.

The reduction in effectiveness can be as great as 95% or more if the protectors are not worn for as little as three or four minutes. It is therefore important to wear HPDs during the entire noise exposure period in order to achieve the maximum protection available.

The effectiveness of HPDS also depends on the manner in which noise is transmitted through or around the protector. The following points should be noted.

  • Even relatively small openings or air leaks in the seal between the hearing protector and the skin can typically reduce attenuation by 5 to 15 dB or more.
  • Constant movement of the head or body vibration can lead to air leaks, therefor making periodic adjustments necessary to ensure a proper seal.
  • Hair, especially long hair and facial hair, can cause a poor fit.
  • Proper fitting is crucial to obtaining a reasonable degree of protection from an HPD.
  • Earmuff effectiveness is greatly influenced by headband tension. If tension decreases through routine usage or alteration by the user, earmuff effectiveness is reduced.
  • Modifying the earmuff by drilling holes in the earcups renders the protection useless.
  • Anatomical differences such as ear canal size, jaw size, and heads of different shape and size may affect the fit of earmuffs and earplugs. To accommodate these differences, HPDs should be made available to users in various shapes and sizes.
  • Recreational headsets such as those used with radios and CD players are not to be used as hearing devices.

Based on Files from the Infrastructure Health & Safety Association: Construction Health and Safety Manual 2013 Edition