Description

‘Cone’ filters with non-linear attenuation These filters are suitable for various applications and offer a so-called progressive attenuation for the high frequencies.

This filters out harmful sounds, while environmental sounds and speech remain audible. There are 5 variants available, ranging from a low to a very high attenuation level.

Each filter is unique and can be used in different situations. With non-linear attenuation it is possible to use exactly the right filter, so excessive attenuation is avoided.

F4 yellow provide a non-linear attenuation. it is suitable for some where that noise isn’t so harmful but for your hearing but you need suppressing it such as printing sound or call center or during sleep.