How come I get different answers about the M16/M4/AR-15 and AK-47/SKS?

Some people say the AK-47 is louder, others say the M16/M4/AR-15 is louder while others say their both about the same. So which is it? And why do different people say different things?

So how does the noise of the AK-47 and M16 really compare to each other?

And what do they sound like off in the distance?
Update: chrisneedsrideln: What exactly are you saying, your post did not make a whole lot of sense.
Update 2: beedsarefunak: I would go to the range but I don't have the money or the time. I would though if I could but I can't. :(
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