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Noise & Vibration Assessments


Rubidium Environmental provides Noise and Vibration Assessments at all levels to suit your needs.
Whether it’s to:

  • Satisfy Ministry of Labour requirements for noise protection related to loud machinery
  • Conduct an Acoustic Assessment Report (AAR) in support of an Environmental Compliance Approval for the MOECC
  • Investigate a noise impact assessment of facilities, buildings, properties, or land uses
  • Conduct an Acoustic Audit of noise mitigation measures

Acoustic Assessment Report (AAR)

The Acoustic Assessment Report (AAR) forms an integral part of the Environmental Compliance Approval application for facilities or operations that are located in close proximity to sensitive receptors such as houses, apartments, schools, hospitals, day cares, and places of worship. Ontario’s Noise Pollution Control Guideline (NPC-300) specifies the allowable noise limits for sensitive spaces. It defines four classes of land, and the applicable noise limits for each.

Class 1 area – major urban centre, where background sound level is dominated by people and road traffic (i.e. City)

Class 2 area – between Class 1 and Class 3, which has sound levels similar to Class 1 during the day, but similar to Class 3 during evening and nighttime

Class 3 area – rural area where background sound level is dominated by natural sounds having little or no road traffic (i.e. small communities, agricultural area, cottage or resort area, wilderness)

Class 4 area – Class 1 or 2 area, that is intended for development with new noise sensitive land uses that are not yet built, is in proximity to existing stationary noise sources, and has formal confirmation from the land use planning authority with the Class 4 Designation

Time of DayClass 1 Area
(dBA)Class 2 Area
(dBA)Class 3 Area
(dBA)Class 4 Area

07:00 – 19:00 50 50 45 60
19:00 – 23:00 50 50 40 60
23:00 – 7:00 45 45 40 55

In building the Acoustic Assessment Report, noise data is collected by onsite measures of the noise-generating equipment, collected from manufacturers data and, where necessary, background noise data from the surrounding area can also be collected from long-term noise monitors. These sound power levels are used to create an acoustic model of the facility to predict the impact at sensitive receptors. If compliance can be demonstrated, then the ECA application can be submitted. If the predicted sound levels are above the guideline, the facility must create a Noise Abatement Action Plan (NAAP). The Noise Abatement Action Plan establishes which control and mitigation measures will be installed by the facility, such as installation of silencers, barriers, etc. that will be required for the facility to demonstrate compliance, as well as the timeline for their implementation. The NAAP will need to be submitted along with the Acoustic Assessment Report for an Environmental Compliance Approval to be granted.

Occupational Noise Exposure

Under the Occupational Health and Safety Act (OSHA) O. Reg 851/90, Industrial Establishments are required to:

  • “take all measures reasonably necessary in the circumstances to protect workers from exposure to hazardous sound levels that result in the exposure limit of 85 dBA being exceeded (8 hour time-weighted average exposure)
  • When the exposure limit prescribed by the regulations is exceeded, the employer is required to put in place measures to reduce workers’ exposure. Protective measures may include: engineering controls to reduce noise at the source or along the path of transmission; work practices such as equipment maintenance (to keep it quieter), or scheduling to limit a worker’s exposure time; and, personal protective equipment in the form of hearing protection devices, subject to the restrictions stated in the regulations

Rubidium can assist by monitoring worker and workplace noise to determine compliance with the OSHA limits. Where necessary, we can conduct an engineering control feasibility study as to the suitability of implementing various controls (enclosures, silencers, barriers, etc).

Exceeding the regulated sound levels? Our job is to provide companies like yours with environmental solutions. Our team of experts go beyond the output of computerized models, and can provide you with realistic solutions based on proven technologies and success. We look beyond the challenges of today, and provide you with information related to how changes in your operations or allowed land uses around your facility may impact your long term compliance risks. Whether it’s working with your architect to modify the building or land, or implementing barriers, silencers, etc.; we will find an environmental solution that works for you.

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