OTOFONIX Helix User Manual page 4

Different Domes (Eartips) can completely change
the sound and feel of your hearing device
Note: If you experiencing any itching in your ear canal while getting used to the ear domes, we
recommend using Miracell Pro Ear, or olive oil. Use less than a drop and apply around the circumfer-
ence of the ear dome to relieve itching.
An Open Style Dome has large vent holes and is intended for people with the typical mild
to moderate high frequency hearing loss who do not need much amplification in the low
frequencies. The larger openings in the dome allow for low frequency sounds to pass though
the dome with minimal amplification and a more natural sound. It eliminates the "occlusion effect" which
is similar to putting your fingers in your ear and hearing yourself talk. On the negative side, open domes
are the most prone to feedback (whistling).
A Close Style Dome has no vent holes. This allows the device to more aggressively boost the
sound levels as much as 15 dB, especially in the low speech frequencies. Often closed domes
are the better answer for people suffering from a more severe level of hearing loss. These