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Everyday Physics
by Jeanette Cain
Talking or singing is actually physics? Absolutely! Turning breathes into sound waves for speaking or singing is made possible by physics.
The vocal chords have two flaps of skin-covered muscle that open and close across the lungs passage that swing back and forth with a wave motion. It is also the same mechanism that keeps
the body stable when the muscles are put into action from exercise, or a bowel movement.
Imagine the open end of an air filled balloon which when pulled tight has a buzzing sound to allow slow escape of the air. Air rushing from the lungs creates a wave motion in the vocal chords. As
quickly as they meet, they separate once again. This vibration releases energy. This energy is recognized by the human ear and brain as sound.
The larynx, at the tip of the Adam's apple, becomes the area for musical notes. The low position of the larynx in humans allows the tongue to move more freely and to be capable of shaping
sounds. We alter our vocal tones by a raising and lowering of the larynx. A singer learns to relax and contract these muscles for producing a resonating waver of vibrato.
Our vocal instruments consist of the throat, tongue, mouth, lips and respiratory system. Quite a collection to be housed within a larynx that is approximately six to seven inches long. The
lips and the tongue help shape the vowels, which may range from a mellow U to a bright and sunny E.
As with any instrument, vocal chords can become damaged due to stress, hemorrhages, heat, smoke, cold air and illnesses. Especially prevalent is the condition of acid reflux. Much of this acid
reflux can be prevented by NOT eating a late night meal or dessert right before going to bed. Physics is a part of our everyday activities.
Maybe its time to recognize how much physics affects our lives. By understanding and recognizing the fundamental physics operating daily within our bodies, we discover new worlds. Physics is an
important part of our lives, whether we are nuclear scientists, teachers, parents or children. Take the next opportunity available to learn how physics can impact your life.
Works Cited:
1. Editors. The World Book Encyclopedia. World Book-Childcraft International, Inc: Chicago. 1990
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