Hearing Aid Domes: Types, Sizing & When to Replace
Domes are the soft tips that sit in your ear canal. The right type and size make the difference between clear, comfortable sound and either a plugged-up feeling or whistling — and they're a routine replacement item.
| Dome type | Best for | How it behaves |
|---|---|---|
| Open | Mild to moderate high-frequency loss | Vented to let natural low-pitch sound through — the most comfortable and least 'plugged up' (least occlusion). The most common starting dome. |
| Tulip | Mild to moderate loss wanting a bit more power | Flexible petals that seal more than an open dome but less than a closed one — a middle-ground compromise. |
| Closed | Moderate loss | Sealed with a small vent; delivers more low-frequency amplification and better noise isolation, with a little more occlusion. |
| Double / Power | Moderately-severe loss and up | Two stacked seals for maximum amplification retention and the least feedback — but the most occlusion. Used with more powerful aids. |
Getting the size and fit right
Domes come in a few sizes (commonly around 6, 8, and 10 mm). A good fit seals comfortably without pressure and stays put when you talk or chew. Too small and you may get whistling feedback or a dome that slips off in the canal; too large and it feels tight. It's normal to need a different size in each ear.
When to replace them
Swap domes every one to three months, or sooner if one looks discolored, feels stiff, is torn, or is clogged with wax — all of which muffle sound and can irritate your ear. They cost little and change in seconds, so keep spares on hand.
Buy the domes made for your hearing aid
Domes are brand- and receiver-specific — match the type and size you currently use to your exact model.
Frequently Asked Questions
What are hearing aid domes?
Domes are the small, soft silicone tips on the end of a receiver-in-canal or behind-the-ear hearing aid that sit in your ear canal. They hold the aid in place, channel sound in, and control how sealed your ear is. They come in different shapes (open, tulip, closed, double/power) and sizes, and they're a wear item you replace regularly.
Which hearing aid dome type should I use?
It generally tracks your hearing loss. Open domes suit mild-to-moderate, mostly high-frequency loss and feel the most natural; closed domes add low-frequency power for moderate loss; double or power domes give the most amplification and seal for moderately-severe loss and up. Tulip domes are a comfortable middle ground. If a self-fitting app or fitter recommended a type, start there — the wrong seal causes either a plugged-up feeling or whistling feedback.
What size hearing aid dome do I need?
Domes come in sizes (often around 6, 8, and 10 mm). The right one seals comfortably without pressure and without falling out — too small can whistle or slip out, too large feels tight. Many people need different sizes for each ear. If you're between sizes or getting feedback, trying the next size is usually the fix.
How often should I replace hearing aid domes?
Roughly every one to three months, or sooner if a dome is discolored, stiff, torn, or full of wax. Silicone hardens and traps debris over time, which muffles sound and can irritate the ear. Because they're cheap and swap on in seconds, keeping a stock on hand is worthwhile.
Are hearing aid domes universal?
No — domes are brand- and receiver-specific. A Phonak dome won't fit an Oticon or Jabra/ReSound receiver, and shapes differ within a brand's own lineup. Always buy the domes made for your exact hearing aid model, matching the type and size you currently use.