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Virtual Dictionary

Pinna Notch

The human ear's pinna is the funnel shaped lobe of flesh that sticks out on either side of the head. It serves to filter and focus directional sound. The pinna notch occurs because the pinna works differently for high frequency sounds than low frequency sounds. Those above a certain threshold are reflected off of the pinna's contours, bouncing back out before they enter the ear.

This creates a very slight delay between the high and low frequency components of the same sound, which effectively acts as a wave filter and cancels out noise, resulting in a sharper sound, and a lessened ability to determine direction.

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Related Dictionary Entries for Pinna Notch:

Acoustic Shock


Pinna Notch


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