The new acoustic concept is inspired by the principle of LIC ( LOUDNESS integrated corrector) technology which has been worldwide patented in 2008.

Inspired by technology used in pro-audio and hi-fi, the realization of the acoustic filter includes the principle of CLI in a hearing protector for the first time.

Physiological principle used to correct an audio signal to obtain a sound subjectively more powerful and balanced when listening at low volume, the loudness correction is to compensate the fact that the human hearing is less sensitive in the bass and high frequencies at a low noise level.

It works by boosting the low and high frequencies to make the sound more natural and dynamic.

You have to know that the human ear does not perceive the sound in a linear fashion.
Its specific amplification curve, peaks around 3000 htz, as shown in the graph cons (equal loudness curves of Fletcher and Munson: average sensitivity of the ear versus frequency Hz and the noise level dB SPL). These curves indicate that the sensitivity of the ear varies significantly depending on the sound pressure. Indeed, when the sound is attenuated, the ear naturally wants to offset all other frequencies it does not amplify naturally and what is much less sensitive.

>A combination of 3 acoustic principles for the best of hearing protection.

1. Uptake: the resonator stimulates extremely high frequencies to avoid a loss of harmonics and to allow the most natural restitution.
2. Attenuation: small tubing and acoustic damper reduce the noise.
3. Equalisation: libby-horn cavity allows an optimum sound projection for the greatest listening comfort.