Guide

Occupational hearing loss: document exposure and file a CNESST claim

Have hearing assessed, reconstruct the noise-exposure history and submit the claim with its schedule.

Sudden loss or acute symptoms

Sudden hearing loss, severe pain, a recent acoustic trauma or dizziness needs prompt medical assessment. Do not wait for the compensation process.

Obtain an assessment

See a health professional and explain workplace noise exposure, protection used, symptoms and their progression. Keep audiograms, referrals, diagnoses and recommendations.

Reconstruct the exposure history

List every employer, job, period, machine, known noise level, exposure duration and protective measure. Add training records, sound measurements, prevention files and coworkers who can confirm the conditions.

Submit the required documents

For an occupational disease, CNESST requires the Worker’s Claim and the schedule corresponding to the disease, including the hearing-loss schedule. Confirm the current deadline and submit a legible file even if some older information is still being obtained.

After the decision

Continue treatment and prevention measures. Keep every decision and its receipt date; if a decision is unfavourable or incomplete, immediately verify review or contest deadlines.

Occupational disease — CNESST

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Official sources are linked in the guide. Checked August 29, 2026; confirm current rules, forms and deadlines with the responsible authority.
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