Hearing

The auditory sense

Already in the womb we notice sounds from the environment

We hear many sounds, e.g. the freindly voices of our parents and soothing sounds of quiet music plays. During the whole life the auditory sense contributes to our social communication and helps with the orientation. Furthermore, it warns against a comming danger.

Our hearing sense is alwys active, even while sleeping at night

Sometimes we get waked up by loud sounds. Our hearing never sleeps. The auditory sense of a human beeing is a very complex system that is constantly moving and never rests. Thus it is also very sensible. The function of the auditory sense reduces over the years. Usually a mild or moderate hearing loss is determined by people from the age of 50. However there are much younger affected people.

The functionality of the human hearing

Our outer ear absorbs sounds and noises. After that they move through the ear canal and strike the eardrum. Through vibrations of the eardrum the three ossicles consisting of hammer, incus and stapes are moving. These are positioned in the middle ear.

In the inner ear the air vibrations are converted into mechanical movements. After that they are transmitted to the cochlea, whose liquid moves the hair sensory cells through vibrations. Fine electrical impulses are transmitted via the nervous system (auditory nerv) to the brain. The brain deciphers the impulses and we perceive those impulses as sounds. Our brain differs in no time if that is a ringing phone, music, speech or the twittering of birds. Our brain deciphers, interprets and arranges the sounds – a brilliant move of nature.