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This exercise strengthens your diaphragm. Gradually increase the amount of time you hold your breath to 20 seconds, 30 seconds, 45 seconds, and 1 minute. Inhale comfortably and hold your breath for 15 seconds before exhaling.Pay close attention to how your lungs feel when you take a deep breath. Once your air runs out, your lungs will automatically begin to inhale deeply in an attempt to satisfy your need for air. Exhale, pushing all the air from your lungs.Doing breathing exercises in which you focus on deep breathing will help you remember to project from your diaphragm. You'll notice that your voice rings out loud and clear when you breathe this way. Practice projecting from your diaphragm by pulling your stomach in to exhale as you speak. When you're breathing deeply, your stomach should move in and out with each breath, rather than your chest rising and falling. Breathing deeply and projecting from your diaphragm is key to having a full, rich, strong voice. The two vowel sounds will likely be audible, but the “t” sounds should have weakened significantly. Then, try repeating the phrase weakly in a quiet tone. You will likely be able to pick up on the ending “t” sounds, even if the “t” at the end of “got” blends into the next word.
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Certain sounds are pronounced while the mouth is only slightly opened, and those will not be affected much. When you mumble, you keep your mouth more closed than usual.Mumbling changes both word formation and the manner in which your voice carries.When you speak, do so in a quieter tone and open your mouth less as you pronounce words.