Dear Self-Communicator:

Dear Self-Communicator:

While I'm sure whatever it is that you are saying to yourself You deem as being important, the people in your vicinity probably think otherwise.
Here are two options available to you in order to curtail this problem:
1) Speak up - Someone might be able to help you with the issue at hand.
2) Zip it up - Speak to yourself with your mouth closed while keeping your voicebox still.
Both of these avenues are sure to cure. Or, as much as you mumble, why not try both!...