Do Wizards Always...?

[S & R Ranch]

No: HPFGUIDX 84608

Do wizards always make noise when they apparate and disapparate? I am 
asking because in book five everyone seems to me making noise when 
they do so. Also in several of the previous books you read about the 
noise...even Dobby the House Elf made a noise when he apparates and 
disapparates. Yet he simply appears in the hedge and Harry's bedroom 
on Privit Drive with no sound. I assume House Elfs have numerous 
abilities and one that would allow them to appear and vanish with out 
making a sound in order to perform their duties without disturbing 
the household. So I can see how Dobby can come and go with out making 
a sound if he chooses to do so. 
Yet when Hagrid disappears at the train station in book one there 
seem not to be any noise. I honestly don't know how someone of 
Hagrid's size could vanish as he did unless he disapparated.
So I assume you can choose to either make or not make a sound when 
you apparate or disapparate.  I would think one in the WW would need 
to be able to control this noise.
What do you think?

sandrranch