There are dozens of people out there without mics; however, they can
still hear you speak. People without a mic speek too, here's how to understand them:
Flashing Handicap: "Will you even the odds please?"
Showing handicap: "Want me to give even the odds?"
Showing stage select: "Any particular place you want to fight?"
selecting up, down on charactor screen repeatedly: "Yes" (head nod)
selecting left, right on charactor screen: "No" (Head shake)
Highlight one charactor, pause, highlight another charactor: "you pick the first and i pick the second please?" (eg: select ShoKhan then montaro = let's have a boss fight)
Flashing yes/no on rematch question: "This will probrably be my last rematch."
block & duck & staying that way at round start: "may i look at my moves list before we start?" (mute people reply yes by stepping back and copying the motion)
standing and blocking for a long duration during a match or when winning the match: Player is likely waiting for lag to pass.
remembering these few moves of the joystick by the other player can allow for a speeking person to understand the communication tactics of a mute player and can allow you to have some of the advantages of gaming that one would find when playing with a non-mute opponet.