Did you replace the batteries in your hearing aid?? Nah just kidding, but that would happen to my wife's grandfather all the time... you could tell by his gradual shift from talking to shouting.
Anyway, are you sure you aren't switching to speaker phone while moving the phone towards your ear?
I'm sure you have tried raising the volume while on a call with the volume buttons.
If you use a headset, does it also sound low?
Are you generally in the same network area as when the sound was good.
Do you have any BBM contacts you could try BBM voice with and see if it also affects the sound there.
And finally, are you running a stock OS or a leak?
Posted via CB10
06-24-13 09:56 PM