OIPC INV-F-26-01595 / WCB-2026-0897 Page 24 of 34

RCH Jan 25, 2026

Assessment of Chief Complaint:
Bt a Pail

Friday 30-Jan Hearing Test Amplifon Clinic Surrey 203A-15135 101 Ave - V3R 7Z1 Surrey.
Hearing found to be normal. 10db drop in left ear in 8khz range, compared to Sept 2025.

Data collected in various work environments with similar noise sources indicate
exposures below hazardous levels. WorkSafeBC has noise data from a BC Ferry data
center in 1991 and from the central computer processing area of a large hospital in
1992 indicating exposure levels of 79 and 72 dBA, respectively. Data on mechanical
switch rooms also indicate exposure levels well below the hazardous criterion
(measured at 70 dBA). These measurements take into consideration noise from
servers, network equipment, and air conditioning equipment.

| have a trauma claim that I’m a bit stumped on. The worker was completing a training
course for a promotion from Jan 12-29. It sounds like it was a computer room setting, so
nothing too loud.

There were 4 people completing the training and this worker happened to be sitting in the
only workstation with 2 computer server towers directly behind him. We have noise data for
server rooms with exposure levels of 72-79 dBA. The worker reported persistent
headaches, loss of sleep, and ear pain a week or So into the course. Definitely no to
acoustic trauma or shock.

However, he also has a history of chronic migraines. "| am prone to migraines and take
steps at home and at work to minimized my exposure to excessive noise. | can not wear
noise canceling headphones while trying to listen to the instructor in the training room." He
also said that the noise was loud for him since the first day, but he tried to put up with it
because all the other spots were full.

Please comment on the best working diagnosis for the condition described.

Please comment on whether the sound exposure would be causative or materially worsen
this condition.