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DIDAVISION


THE HUMAN EAR


THE HUMAN EAR
THE HUMAN EAR

Structure of the human ear. Description of how it works.Characteristics of different sounds. Sonic contamination.


INTRODUCTION
Hearing is one of the most important senses in manís communication process due to the important role it plays in the mechanism of speech.
It allows us to hear a tremendous number and variety of sounds.
The sensations of balance and movement.

NATURE OF SOUND
The sound we hear is produced by the vibrations provoked by disturbances in the air.
How loudspeakers work.
Pitch and intensity of sound.
Sound frequency is measured in Herzs.
Sound cannot be transmitted in vacuum.
Each time sound has supporting media, it travels in a straight line and then it travels in all directions.
Our sense of hearing can distinguish between a great variety of sounds at one and the same time.

STRUCTURE OF THE EAR
The external ear, the middle ear and the internal ear.
Functions and characteristics of our ears.
The middle ear: the malleus, incus and stapes.
The Eustachian tube.
The internal ear: a snail-like structure; organs of balance and position regarding gravity.
Manís organs of balance have their origins in fish.

PERCEPTION OF SOUND
Sound can have a surprisingly subtle influence on human behaviour.
Sound intensity is measured in decibels.
Prolongued exposure to noise may result in partial deafness.
Apart from making communication more difficult noise can also cause psychological problems.
Noise affects our sleep, concentration and efficacy.
Noise has been pointed out as one of the most serious environmental hazards of modern-day society.

SUMMARY

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