Hearing Aid Filter

A hearing aid filter (wax filter or wax guard) is a small part that protects the device's sound outlet, and on some models the microphone inlet, from earwax, dust and moisture. It is used in in-the-ear devices and in receiver-in-canal (RIC) behind-the-ear devices whose receiver goes into the ear canal. The right filter helps keep the device's sound clear and prevents receiver faults.

Why do filters get blocked?

The ear canal produces earwax all the time to clean itself. Over time this wax can close the filter's small holes; the sound from the device then becomes quieter, muffled or stops completely. Many users think the device has a fault, but often changing the filter is enough.

How often should it be changed?

To hear more clearly, remember to change the filter every three months. For people with more earwax this period can be shorter; when you notice your sound getting weaker, check the filter first.

Points to note when changing

• Filters come in different sizes and types depending on brand and model; use the one that fits your device.
• Filter packs usually include a small stick for removing the old filter and fitting the new one; do not use the same end for both jobs.
• Change the filter at a table, in good light; small parts can easily fall.
• If the sound does not improve after changing the filter, have the device checked at our centre.

You can get filters for in-the-ear and behind-the-ear hearing aids from our Pendik centre; we can do the first change together to show you how it is done. For regular care tips see our hearing aid maintenance page, and for faults our technical service page.