MC-22578Silent Creepers
While I was "caving" I decided to turn around and there was a creeper next to me already about to explode. I didn't hear the fuse start neither was he able to attack me from falling, because the cave was small and there were no places above me for them to spawn. When he exploded, I heard that perfectly so I knew there wasn't anything wrong with my volume.
Created Issue:
Silent Creepers
While I was "caving" I decided to turn around and there was a creeper next to me already about to explode. I didn't hear the fuse start neither was he able to attack me from falling, because the cave was small and there were no places above me for them to spawn. When he exploded, I heard that perfectly so I knew there wasn't anything wrong with my volume.
I can confirm this for MC 1.9.4. However, it might be due to many other sounds happening at once. Regardless, there are still instances in which a Creeper blows up without any hissing noise. I've been testing a custom map that involves lots of invisible creepers (Flat plane, they can't drop on your head), and have been blown up numerous times now because they made no noise.
Creepers are supposed to be silent when coming up to you. Are you sure that you did not hear the fuse start?
I know creepers don't make any noise naturally. However the creeper was next to me for a while and I didn't here any hissing. I even looked at it while it was supposed to be hissing.