Use your diaphragm. When listening to your voice, consider whether you are using a nasal, mouth, chest, or diaphragm voice. A nasal voice sounds unpleasant and whiny, a mouth voice sounds very quiet, a chest voice sounds pleasant, but a diaphragm voice is the most powerful and has the best sound. To develop the diaphragm voice, practice breathing deeply and watching your stomach rise and fall. Make sounds that come from the diaphragm, such as laughing or yawning. Once you get the hang of it, it is merely a matter of maintaining the voice. A voice teacher can help you project from the diaphragm.
