Human ear and its functionality


The most amazing functions of human body include “Auditory system”.  Hearing is a gift that is often taken for granted. It is hard to imagine what life experience when there is a totally mute scenario.

Human Ear is a mode of communication which performs vast number of tasks to make a sound wave audible for us. It never let go any sound wave without being aural to us. The working mechanism is too complicated that can never be obtained artificially with such fine accuracy.

Human Ear is particularly a precise neural auditory organ of the body. It remains on alert at conscious state.

About Human Ear

The Ear is a consistent sensory organ with a complex mechanism. Main structure of peripheral auditory system includes ear with its divisional parts. These three divisions include;

  • External Ear: It consists of Auricle, the auditory canal, and the Eardrum.
  • Middle Ear: It is comprised of the Malleus, Incus and Stapes. These are the smallest bones of human body.
  • Inner Ear: It is a complicated mechanized part which is composed of liquid filled Cochlea and Cochlear canal with 20 thousand ciliated cells. Ciliated cells are nerve cells used in the signal transmission to the brain.

Hearing Range

Human ear is sensitive enough that it can even detect sound waves that resonates air molecules of an atom’s span. On the other hand, it is also able to mechanize a maximum overloaded sound wave that is undesirably distorted. Louder sound waves are audible through Automatic Gain Control System (ACG) which responds to soothe the mechanism.

Human Ear in perfect working condition has a dynamic hearing range between the softest and loudest sound. The average range of human ear is calculated more than 120 decibels.

Decibel is a unit for calculating log of ratio of two figures multiplied by 10. Hearing 120 decibel of range means our ears can hear sounds whose potency lies within 12 orders of magnitude.

Ear Frequency

Human ear can hear a multiple frequencies of sound. The magnitude of hearing frequency ranges from 20 Hz to all the way up to 20 thousand Hz.

Hearing Function of Ear

Functionality of auditory system is still in research for complete analysis. Only a brief description available that shows working of major components of Human Ear.

Outer ear with ear canal and drum transmit sound from outer side to inner parts of auditory system. While they transmit sound waves, ear canal additionally reflects and absorbs certain frequency to shape the spectrum of incoming sound. Since some sound’s wave length destructive interference which can be damageable to inner parts,

therefore ear canal is naturally made in specific shape and diameters that can reflect back damageable sound waves out.

When sound waves reaches Ear drum which is a small membrane of 1cm diameter, it resonates to move ciliated cells that immediately transmit and receive signals from brain.

Balancing Characteristics of Hearing Function

Reflexive Motor effects: This effect is applied to maintain balance of eyes and head while walking, sitting, and sleeping and maintaining other body languages.

Sensory Effects: Positioning and corresponding movements of head. Sound hearing mechanism.

Perceptive Vigilance: Maintain alertness by triggering sleeping and waking phases.

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