Strange noise coming iPhone when it vibrates...

[damgui]

My iPhone doesn't make the same noise when it vibrates when I take it vertically or horizontally.

Besides, when i slightly shake it makes a very strange noise (cf. my video:http://www.youtube.com/watch?v=biriA93j7tU)

This is my 3rd iPhone, all the others had a display problem, but this one is perfect, except this noise.
Please, tell me what you think about it, and if i should take it back to Apple.

(My mother has an iPhone which makes almost the same noise when shaken, but i have a friend whose iPhone doesn't make this noise...).

Thanks for your replies!

 

[chargit]

My iPhone doesn't make the same noise when it vibrates when I take it vertically or horizontally.

Besides, when i slightly shake it makes a very strange noise (cf. my video:http://www.youtube.com/watch?v=biriA93j7tU)

This is my 3rd iPhone, all the others had a display problem, but this one is perfect, except this noise.
Please, tell me what you think about it, and if i should take it back to Apple.

(My mother has an iPhone which makes almost the same noise when shaken, but i have a friend whose iPhone doesn't make this noise...).

Thanks for your replies!

the only moving part inside an iPhone is the vibrator. that is the noise you are hearing. unfortunately some are louder than others. the only thing you can do is replace the vibrator but they are all going to do it to some extent and get louder with age I would assume.