Occlusion effect
Overview
 
The occlusion effect occurs when an object fills the outer portion of a person's ear canal, and that person perceives "hollow" or "booming" echo-like sounds of their own voice. It is caused by bone-conducted sound vibration
Vibration
Vibration refers to mechanical oscillations about an equilibrium point. The oscillations may be periodic such as the motion of a pendulum or random such as the movement of a tire on a gravel road.Vibration is occasionally "desirable"...

s reverberating off the object filling the ear canal
Ear canal
The ear canal , is a tube running from the outer ear to the middle ear. The human ear canal extends from the pinna to the eardrum and is about 35 mm in length and 5 to 10 mm in diameter....

. When talking or chewing, these vibrations normally escape through an open ear canal; most people are unaware of their existence. When the ear canal is blocked, the vibrations are reflected back toward the eardrum.
Quotations

Only in America.

I can't believe that having said what I said was interpreted as having been what I said when I said it, because I said it where I said it, when I said it, and who I said it to.

I can't believe what I said about myself. What I said in my own private conversations with myself to an ESPN producer are my business, and I had no business saying them to someone else.

If a bullfrog had wings it wouldn't bump his behind every time he hopped.

Martin Luther King took us to the mountain top: I want to take us to the bank.

Thank god for money.

 
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