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The Transmission of Sound

المؤلف:  GEORGE A. HOADLEY

المصدر:  ESSENTIALS OF PHYSICS

الجزء والصفحة:  p-195

2025-11-13

501

The vibrations of a sounding body may be transmitted by any elastic substance. Gases, liquids, and most solids transmit sound, but with varying intensities and velocities.

1. Gases. - That gases transmit sound is a matter of universal experience, since the air is the common medium of sound transmission.
2. Liquids. - Sound is transmitted by liquids more readily than by gases. A person swimming under water can hear with great distinctness the sound of two stones struck together under the surface.
3. Solids. - A long wooden rod, a section of gas pipe, or the wires of a wire fence can be used as a means of proving that elastic solids are good conductors of sound. If an observer places his ear at one end of any of these, while the other end is scratched with a pin, the sound of the scratching is plainly heard through the solid body, though it may be entirely inaudible through the air.