Those who have studied singing and know that drumming involves resonators - "sound system" of the human body. Resonators are the nasal cavity, maxillary sinus nasal cavity, frontal sinus, oral cavity, larynx, pharynx, trachea, lungs and bronchi. This air-filled space, which convert sound vibrations. It is the resonators give the voice strength and tone. If you are using the upper resonators of the voice becomes sonorous, when you use a lower stronger tone and painted. To master the chest voice, singers are learning to sing "on a pedestal" - not due to the tension of the vocal cords, and due to the correct use of resonators. Singing or talking "on a support" means breathing with the diaphragm or belly breathing. To practice this breath, lie on your back, put a book on your belly and breathe - the book should rise and fall.
Put your hand on your chest and slowly pronounce any vowel as you would speak in life. If you feel vibration in the chest, then you say chest voice, if not feel - the main cavity of your body not involved. Each person has their own natural gifts, its thickness and the length of the ligaments, etc., so every vote is individual and has its own unique, recognizable timbre. The range of the chest voice at everyone, but in any case it is. On average, the chest range is two octaves.
Do the exercises for the lower resonators: drawl pronounce vowels, leaning forward (from a standing position);drawl pronounce the words on the exhale. Use the technique which is used by vocalists when singsong: propevia a vowel or syllable from the bottom up, then top down. At the same track involving the thoracic cavity, as it connects with the head as you go to the head resonator. Then try to use the chest cavity in the conversation. Read excerpts from the works. The more you train, the more chest voice will be second nature.
Train yourself to relax your body and muscle clamps interfere with the beautiful sound production. Strain should only the muscles of the diaphragm. The jaw and lips should also be relaxed for good articulation.
Try to develop a characteristic chest voice rate of speech - smooth and measured. It is difficult to talk low voice , quickly and sharply. Measured it helps to influence the psyche of the audience, and give them a sense of confidence and security. Such a person is easier to make the right impression and to convince the interlocutor in any way. Especially chest voice is often used in the work of psychologists.
Correct voice training is especially important for those who speak in public or communicate a lot on the nature of the profession.