The acoustic filter is a small round piece that is inserted into a personalized ear Mold. It is fabricated from a Mold of your auditory canal and will reduce some of the sound energy that reaches the auditory canal.

The specificity of the filters used here is that they have linear fade curves, this means that they fade the varying frequencies of the auditory spectrum in the same way. As a result, the sound that exits the filter is the sound that is heard at the entrance to the auditory canal, but at a lower level (Thus reduction depends on the strength of the filter). The quality of the sound is the same but at a sound level that does not take away from your hearing.

It is a bit like having access to the volume of the room. We suggest fade filters of 9Db, 15 dB, and 25 dB, choosing those that are best adapted to your practice.