Static sound in speaker

[Jordss]

I have noticed that the bottom speaker of the 5s has a static sound on certain occasions, these being a few seconds after sound is played, if I switch the ringer on silent and say im playing a game which plays sound, but it's on mute, I can only just hear it when the room is silent but just want to know if this is normal? Sorry but I always get worried with little things about phones haha, thanks

 

[Just_Me_D]

I've not noticed. Sorry.

 

[kataran]

My 5s doesn't show any signs of static. Could be what your hearing is the vibration motor

 

[Jordss]

Well I spoke to apple and they said it doesn't seem right and to book an appointment with someone In store,

If it does turn out to be faulty, would they just replace the speaker in the phone or would they give me a brand new phone? And not a refurb,

My phone is less than a week old, any ideas?