Sound i

Just close your eyes and you’ll hear those waves breaking against the shore. It reaches

us in an instant – a primeval sound.

The motion of the waves is a process in time and space, and has many guises – light,

gravitation and sound. Sound waves occur when the air is subjected to a disturbance –

the vibrations in your vocal chords or the pounding of a stamping press. The waves are

transmitted through the air and picked up by the eardrum.

This wave motion can be described mathematically with the help of an equation. As

you’ll note, wave motion is a complete science. We at Peltor take charge of this science

and turn it into practical knowledge: the market’s most effective hearing protection.

Destructive waves

Always wear Peltor!

Acoustic waves are a fundamental part of your hearing

ability – which cuts both ways. The waves are a pre-

requisite for the transmission of sound. But if they are

not within the ear’s “natural” acoustic range, they have

a destructive effect.

Located inside your inner ear are the wave spe-

cialists: hair cells with their fine hairs. It is these hairs

that are set in motion by the sound waves the ear

receives. And the higher the sound level, the more the

hairs flutter. This motion is converted into nerve

impulses that are passed on to the brain. But if the

hairs are repeatedly subjected to excessively high

doses of sound, they eventually break off. Those that

survive only manage to transfer a fraction of the infor-

mation. The result is impaired hearing.