As you flush the toilet, it sounds as if it is a balloon losing air. It seems to be flushing properly. After a while, the sound stops. This started as a once in a while occurrence and now happens every time you flush. What cuases this sound and is it an easy fix?

Your flush valve, particularly if an older ballcock type will make this noise when it is going bad. Lift the tank top off, flush the toilet and when you hear the noise, lift the float arm, or float. If the noise goes away, you need a new flush valve.