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(THE AURICLE (Ear pinna

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(THE AURICLE (Ear pinna

THE AURICLE (Ear pinna)

The outer ear is the external part of the ear, which collects sound waves and directs them into the ear. Read about the autonomy, the outer ear parts and the function of the outer ear.

The pinna
What is the pinna? The pinna is the only visible part of the ear (the auricle) with its special helical shape. It is the first part of the ear that reacts with sound. The function of the pinna is to act as a kind of funnel which assists in directing the sound further into the ear. Without this funnel the sound waves would take a more direct route into the auditory canal. This would be both difficult and wasteful as much of the sound would be lost making it harder to hear and understand the sounds.
The pinna is essential due to the difference in pressure inside and outside the ear. The resistance of the air is higher inside the ear than outside because the air inside the ear is compressed and thus under greater pressure.
In order for the sound waves to enter the ear in the best possible way the resistance must not be too high. This is where the pinna helps by overcoming the difference in pressure inside and outside the ear. The pinna functions as a kind of intermediate link which makes the transition smoother and less brutal allowing more sound to pass into the auditory canal (meatus).

Ear pinna

-Collects Sound

-Helps in sound localization

-Most efficient in directing high frequency sounds to the eardrum

(THE AURICLE (Ear pinna

(THE AURICLE (Ear pinna

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