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Community6 min readMay 28, 2026

Hearing Amidst the Noise: Restoring Sound in the Heart of Yamasa

Inside our Perry-Medico mission trip to Yamasa, Dominican Republic — where our team cleaned ears, took impressions, manufactured custom earmolds on site, and fit 185 hearing aids in a single week.

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Sense of Hearing Team

Perry-Medico Mission Volunteers

Hearing Amidst the Noise: Restoring Sound in the Heart of Yamasa

Every mission trip has its unique rhythm. Usually, the Perry-Medico team arrives in Yamasa on a Friday, giving us a weekend to acclimatize to the heat, the humidity, and the pace of life before the clinic doors open.

This year, however, threw us a curveball. Due to a booking change, our schedule shifted to a Monday-to-Monday itinerary. After leaving Toronto at 9:00 a.m. and arriving in Yamasa at 10:00 p.m., there was no time to adjust. We hit the ground running, opening the clinic at 8:00 a.m. the very next morning.

Despite the exhaustion, the compressed schedule, and environmental challenges, the trip was a resounding success. Here is a look at our week in the Dominican Republic.

The Perry-Medico mission team gathered together in front of the colourful YAMASA letter sign in the Dominican Republic
The Perry-Medico team in Yamasa, Dominican Republic.

Life in Yamasa: The Sensory Experience

As always, we were welcomed into the homes of local families. These homestays are the heart of our trip, grounding us in the community we serve.

Amenities in Yamasa vary from home to home. Very few houses have air conditioning, and hot water is a luxury usually provided by rooftop tanks warmed by the sun. However, in the Caribbean heat, those cold showers became a welcome way to cool off after a long day.

This year presented a new challenge: recent hurricane damage had caused widespread power outages. Without electricity, many homes couldn't run fans at night. This meant sleeping with the windows open, which invites the soundtrack of the town inside.

Yamasa is a vibrant, noisy place. Between cars and motorcycles missing their mufflers, loud music, barking dogs, and the inevitable 4:00 a.m. roosters, a full night's sleep was hard to come by. It is a noisy world — which makes the work we do there all the more vital.

A young boy in Yamasa wearing a behind-the-ear hearing aid, standing with a smiling adult behind him outside the clinic
Outside the clinic in Yamasa after a fitting.

Inside the Clinic

We operate on a first-come, first-served basis, and the need is always high. Because of the constant exposure to loud noise and a high prevalence of untreated ear infections, we see many clients with profound and asymmetric hearing loss.

The Process

Our workflow is fast-paced but thorough:

  • Cleaning — We encounter significant cerumen (earwax) buildup, so many clients require cleaning before testing can even begin.
  • Testing & Molding — Once cleared, we test hearing levels. If a hearing aid is needed, we take an impression.
  • Manufacturing — We create custom earmolds in our on-site lab in under an hour.
  • Fitting — Clients tested in the morning return in the afternoon for their fitting.
A Perry-Medico clinician using a lighted otoscope to examine the ear of a staff member from the Centro de Salud Sra Maria in Yamasa
Examination and cleaning at the Centro de Salud Sra Maria, Yamasa.

This year, we ran two fitting rooms with two clinicians working simultaneously. By the end of the week, we had successfully fit 185 hearing aids.

Two Perry-Medico clinicians prepare a hearing aid for fitting while a young patient waits in the chair
Final preparation before a hearing aid fitting.

Adapting Our Technology

The environment in Yamasa is tough on electronics. Traditionally, we fit Behind-the-Ear (BTE) models because they are durable. However, Receiver-in-Canal (RIC) devices are becoming more common in our donation pool — making up about 55% of what we fitted this year.

While RICs are excellent devices, they don't hold up as well in the extreme heat and humidity, and finding replacement parts locally is difficult. However, our philosophy is to make the best use of what is available to us to help as many people as possible.

To ensure longevity, we continued training a local man who has been part of our group for years. He is learning basic cleaning and troubleshooting techniques to help keep these devices working long after we have returned to Canada.

A young man in a school polo smiles and cups his hand to his newly fit hearing aid, posing with two Perry-Medico team members
A patient testing out his new hearing aid for the first time.

A Lasting Impact

The Perry-Medico mission is about more than just Audiology. With the Mother/Baby and Pharmacy programs working alongside us, we are able to provide a holistic approach to healthcare.

The full Perry-Medico mission team gathered together inside the Yamasa clinic at the end of the week
The 2025 Perry-Medico team in Yamasa.

Thanks to the continued support from our volunteers and fundraising initiatives, we are seeing real improvements year after year. We are doing more than handing out devices; we are promoting independence and strengthening community well-being.

Despite the heat, the noise, and the lack of sleep, the gratitude of the people in Yamasa makes every moment worth it.

Inspired by the work we do? Book an appointment at any of our 14 Ontario clinics — every visit helps support the next mission trip.

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Written By

Sense of Hearing Team

Perry-Medico Mission Volunteers

The Sense of Hearing team partners with Perry-Medico each year to bring audiology care, hearing aid fittings, and follow-up service to underserved communities in Yamasa, Dominican Republic.

Tags

Mission TripPerry-MedicoYamasaDominican RepublicCommunity OutreachHearing Aids