What nouns have no reverberate to the human ear?
Answer:
a duck's quack
A duck's quack does not echo.
the nouns of silence...
great song
Ultrasound
A sound to be precise given in a place where on earth there is nought for it to bounce off of.
An "Echo" is defined as the "reflection" of nouns off something else. If nearby is nothing for the nouns to reflect from, afterwards there can be no reverberate.
Ron.
It is said that a duck's quack doesn't echo, but on Mythbusters they tried it and found that quacks -do- resonate. The only nouns that won't echo is a nouns you can't hear in the first place.
a nouns you cant hear in the first place!
the nouns of silence
On the human ear? anyone has no noise
bouncing from walls and into the ear again? duck quacks