Currently viewing Vol. 1 • Issue 1 • 2014

A Newly, Revamped CSA Standard Is Coming Up

Noisy Notes

Editor’s Note: This column points out the difference between the perception of occupational noise and its actual measurement. This is important clinically where we perform a case history. Asking if the client’s work environment is noisy, probably will provide little or no information, especially if they say no.

Well, well, well, another one? What is a Standard, anyway?

As per Wikipedia, “A standard is an established norm or requirement in regard to technical systems. It is usually a formal document that establishes uniform engineering or technical criteria, methods, processes and practices.” In Canada, standards are written by experts in a given topic published by the Canadian Standards Association (CSA). Standards are reviewed on a regular basis so users are always receiving the most current guidance.

Now, why are we interested in standards, and what do they have to do with our everyday activities in the world of hearing?

Until recently they were two standards on the subject of hearing screening: the CAN3-Z107.4-M86 pure tone air conduction audiometers for hearing conservation and for screening and the CAN/CSA Z107.6-M90 (R2010) pure tone air conduction threshold audiometry for hearing conservation. The first one was discontinued in 2010, though the content will not be lost and will be contained in the new Z107.6 that is presently being revised by a CSA Subcommittee.

The Z107.6 standard, first published in 1975, was revised on several occasions and was reaffirmed in 2001.It is however time to review the content again as well as to expand its scope. It will still deal with requirements for audiometers and testing facilities, and testing protocols, However, new information will include information on how to interpret the test results and will recommend actions to the tested individual and to the person in charge of the Hearing Loss Prevention Program at the workplace.

Let’s take a step back and have a look at the big picture of noise in the workplace. Hearing testing is only one component of a Hearing Conservation Program, or Hearing Loss Prevention Program. CSA is strongly committed to the reduction (or even elimination) of occupational noise induced hearing loss. For that purpose another subcommittee is hard at work preparing an umbrella document, the CSA Z1007 Hearing Loss Prevention Program Management, intended to provide comprehensive guidance to employers and managers for the management of programs designed to protect individuals exposed to occupational noise. As an important element of the Z1007 standard, one section is devoted to audiometry. The experts of Z107.6’s subcommittee will therefore also provide the information that Z1007 needs in that respect.

Z1007’s section on audiometry will not detail specifications for audiometers and audiometric booths, and instead will deal with management issues such as how often hearing tests should be conducted, the qualifications necessary for the audiometric tester, as well as how to use the information from the hearing tests to help prevent further hearing loss in the workplace. Whereas Z1007, once finished, will be a management tool, the new Z107.6 will be a stand-alone standard, containing material exceeding the content of Z1007’s audiometry section.

About the authors
Alberto Behar

Alberto Behar, PEng

Alberto Behar is a professional engineer and certified industrial hygienist. He is also an adjunct assistant professor at the University of Toronto and research assistant at Ryerson University.

Sasha Brown

Sasha Brown, MSC, RAud, Occupational Audiologist

Sasha Brown, MSC, RAud, Occupational Audiologist, is with the Prevention and Occupational Disease Initiatives, WorkSafeBC.