iphone is not making any noises?

[Sarah]

all of my ringers are on high
everything
the only thing that works is my ipod
but when someone calls it just vibrates

and my applications aren't making any noises either
nothing is turned off, and all of the volumes are on high.

[Alfi]

You might need to restart it you do that by holding the top button and the home button at the same time for like 5 seconds of the switch on the side might be switched up instead of down