Wave Power Transmission A Brief Statement of the Physical Principles Involved Classic Reprint

Excerpt from Wave Power Transmission: A Brief Statement of the Physical Principles Involved

When a body executes a motion at regularly recurring intervals of time, the motion is said to be periodic. When this motion is, in addition, continually and periodically reversed in direction, it is said to be vibratory. A wave is the transmission of such a motion through a imedium. Consider a straight line composed of particles of air con meeting the source of, a continuous note with one's ear, and assume that the sound is produced by the vibration of a plane diaphragm. On the outward stroke of the diaphragm the particles near it would be com pressed, because of the inertia (or tendency to stay still) of the particles more remote, while the compression is rendered possible by reason of the elasticity of the air.

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