Audio filters
Description
Box of 8 black audio filters + 1 fitting tool
The passive audio filters are easily changed, and adjust the frequency range to
your individual preferences to give you full, crystal-clear sound.
The purpose of the audio filters is to provide you with the best possible sound
quality that you would hear if you were not wearing ear tips. Because everyone’s
hearing is different, with Audéo PFE you can choose the audio filter that suits
you best. The filters also protect the sound tube from dirt, and this can extend
the life of your headphones.
The black audio filters amplify bass and high frequencies.
The box contains 8 filters of the selected color, plus a fitting tool.
Parts & Accessories
Box of 8 gray audio filters + 1 fitting tool
The passive audio filters are easily changed, and adjust the frequency range to
your individual preferences to give you full, crystal-clear sound.
The purpose of the audio filters is to provide you with the best possible sound
quality that you would hear if you were not wearing ear tips. Because everyone’s
hearing is different, with Audéo PFE you can choose the audio filter that suits
you best. The filters also protect the sound tube from dirt, and this can extend
the life of your headphones.
The gray audio filters emphasize mid-range frequencies.
The box contains 8 filters of the selected color, plus a fitting tool.
Specifications
Technical background
When wearing Audéo PFE the ear canal is blocked and the function of the ear is changed:
- The amplification of the pinna disappears.
- The natural resonance of the ear canal disappears.
That has to be compensated by the earphone, so the target curve is theoretically
the open ear transfer function, which corresponds to a flat curve in the free field
and diffuse field:
Open ear simulator transfer function graph Figure 1: Open ear simulator transfer
function
The earphones must recreate these phenomena for the user to perceive a natural sound.
Since each person has a different ear, the compensation curves should be different
from one person to the other. Standard earphones do not take these factors into
account, which makes Audéo PFE unique.
Internal studies at Phonak have shown that most people are not comfortable with
a sound from an earphone that reproduces exactly the curve of a standard open ear.
The curves of Audéo PFE are a compromise between a frequency response that includes
the full open ear gain compensation as well as one that has bass and treble predominance.
This compromise has been shown to produce greater satisfaction among test users,
and therefore Audéo PFE offers two filter types to accommodate the widest range
of user preference.