- The average adult breathes 12 – 20 times a minute.
- Tidal Volume: the amount of air you breathe in and out during one respiratory cycle.
- Vital Lung Capacity: the total volume of air exchanged from deepest inhalation to deepest exhalation which varies depending upon height, weight and age.
- Total Lung Capacity in adults (normal, healthy) is 3 to 5 liters.
- In an upright posture, most conversational speech occurs within 40-80% of vital lung capacities.
- Singing long phrases may require all the reserve volume of the lungs. Singing requires significantly more lung volume than conversational speaking.
- When the vocal folds are adducted for singing or speaking, there is greater resistance to the airflow. More lung pressure is necessary to expel the air effectively.
- As the pitch goes higher, the vocal cords elongate and become stiffer, which requires more lung pressure to maintain the same amplitude of vibration.
- Much of the speech breathing information reported here is extracted from Ingo R. Titze’s, Principles of Voice Production.
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