If a tree falls in a forest and no one is around to hear it, does it make a sound?
 

What do you think? IMO it does make a sound. If someone was there to hear it, instead it would make noise.

Yes, it makes a sound.

Now, why did the chicken cross the road?

To go to the other side?

What came first, the chicken or the egg?

If you're driving down the street in your motorboat and your wings fall off, how many pancakes does it take to cover a doghouse?

Neither, they evolved from some microorganism from the water.. ;)

Yup. I really hate the 10 characters limit on LQ.

How come with us its an abortion, but with a chicken, its an omelette?

--George Carlin :D

The chicken crossed the road because it was too far to walk around.

I don't think chickens think that far into it :)

If a man speaks in the forest, and there is no woman there to hear him, is he still wrong?

As for sound:
First, Webster:
This has a strong bias towards defining sound as our **perception** of pressure waves in air. Consider this: Before there were any life forms that could sense "sound", there were still pressure waves. "Sound" is the name given by humans to a subset of pressure waves which they are able to sense. Dogs can sense pressure waves that we cannot. Since we can't hear them, we don't call them "sound"---unless we are projecting ourselves into the mind of the dog---ie imagining what they are "hearing".

Therefore, the answer to the original question is "no".

Hogwash. So if we were there, it would make a sound and it would make the same sound if we weren't there. The real answer is, yes it makes a sound that is unheard. ;)

Nope, sorry, you're wrong. I checked it out and it was completely silent.

It all depends on the definition of "sound".....I take it to be the human **perception** of pressure waves. No human---no perception.

What is the speed of sound in a vacuum?

You'll never know. Because if there is no one near, how do you know if/when tree falls at all?

NaN, because sound doesn't exist in vacuum.