Pump Down The Volume: Noise Pollution Is Serious Stuff.

Pump Down The Volume: Noise Pollution Is Serious Stuff.
While it’s impossible to make a factory blasting at full output TV studio quiet, steps can be taken to reduce noise as much as possible – which translates into high productivity and fewer worker’s comp claims for hearing loss.
– By Isaac Rudik

In a world where workplace and outside noise can seem like an unyielding din, it is easy to take hearing for granted. Moreover, symptoms of hearing loss can be overlooked since they appear gradually and are seldom associated with pain. As a result, increasing deafness remains unnoticed often for years until it’s too late.

In fact, among all occupational hazards, noise is the biggest cause of permanent disability claims settled by Ontario’s Worker’s Compensation Board. According to WSIB, hearing loss due to high workplace noise levels resulted in roughly $100-million in claims paid out over a recent 10 year period.

As a result, Ontario’s Ministry of Labour introduced strict limits for workplace noise exposure. Among other things, the government reduced the allowable exposure time to noise by workers in half. The Environment Ministry deals with preventing excessive noise in Ontario, and sounds produced by human activity is controlled by the laws in the Ontario Environmental Protection Act (EPA), which holds that noise is a contaminant with adverse effects on workers.

Why? Because researchers proved that an individual exposed to 85dba for eight hours a day, week after week, will suffer hearing loss. The louder the sound, the less time it takes. Thus, the noisier the workplace, the fewer exposures and time it takes to produce significant – and, for employers, costly – hearing loss.

Achieving Results

While it’s impossible to make a factory blasting at full output TV studio quiet, steps can be taken to reduce noise as much as possible.

Executives at an Ontario tool-and-die maker knew they were in a noisy business; it’s in the nature of what the company does. But they were intent on reducing noise levels as much as possible. For one thing, they didn’t want to be socked with expensive worker’s comp claims if employees started suffering hearing problems; for another, they recognised that high noise levels meant lower productivity.

The company developed a three-prong strategy: Remove, Reduce, and Rest.

The company removed as much noise as possible from its plant and then reduced the amount of noise entering the workplace. Following exposure to loud noise, auditory rest is crucial to allow recovery time for the hearing system.

The plant formed a management-worker committee and following guidelines created by the Canadian Hearing Society.

First, noise was reduced at the machinery sound source, either by isolating machines or installing insulating materials to muffle sound and vibration.

Next, within the plant sound barriers made of acoustic materials were installed along with adding machine enclosures, equipment mounts, exhaust silencers and mufflers. Where possible, sound-absorbing coatings were applied to machines and plastic gears substituted for metal ones. Each helped reduce noise.

Finally, schedules were re-configured to allow workers to rotate to less noisy areas during their shift. They were also provided personal hearing protection and instructed on its proper use.

Primary Solution

The company used a variety of SONEX Panels which provided it with a range of acoustic solutions that met both functional and aesthetic requirements. The panels are used in everything from industrial facilities to manufacturing plants, warehouses, schools and universities, churches, multi-purpose rooms, cafeterias, offices, retail stores, recording studios and many other locations requiring acoustical control.

SONEX panels were chosen for their adhesive-applied installation and are all made with Willtec® foam, which is fire rated Class 1. At the same time, SONEX Valueline Baffles helped improve communication, reducing echo and reverberation in large open areas such as the production plant and warehouse.

Although the company absorbed an up-front investment, it noticed improved productivity on the plant floor almost immediately. Moreover, it received a number of points towards its LEED certification as an all-around healthy and green workplace – which is paying off in employee retention.

Coupled with reducing the likelihood of joining a long line of companies facing worker comp claims for hearing loss, the company is delighted it pumped down the volume.

Isaac Rudik is a compliance consultant with Compliance Solutions Canada Inc. (www.compliancesolutionscanada.com), Canada’s largest provider of health, safety and environmental compliance solutions to industrial, institutional and government facilities.

E-mail Isaac at irudik@csc-inc.ca or phone him at 905-761-5354.