Any vibrating object—a wooden reed, a string, a cymbal, a bell—produces sound waves. These waves are capable of causing a second object in close proximity to sound as well, even though the second object is not set in motion directly by physical means. This phenomenon is called sympathetic resonance.
Vibrating objects with musical tonality are not the only things that resonate. Words are capable of doing the same thing, albeit in a different way....more
Brian T. Maurer has practiced pediatrics as a Physician Assistant for thirty years. His "Marginal Notes" column appears periodically in the Cell2Soul Blog. The title "Marginal Notes" is taken from a quote by Henry David Thoreau: "I love a broad margin to my life."