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The longitudinal nature of sound waves Concept of excess pressure Newton's
law of sound propagation Absence of dispersion Specific acoustic. for this
quantity is the decibel (abbreviated dB). If the intensity of a given sound in
absolute units ...
Wave fronts and rays. It has already been pointed out that an audible sound
wave tends to spread out in all directions from the source. It is helpful in
describing this situation to introduce the concept of wave front: an imaginary
surface of such a ...
When a sound wave strikes an obstacle of finite size, some of the sound energy
is reflected, some is transmitted into the obstacle, and some gets around the
obstacle and is said to be diffracted. It is customary to say that the original beam
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review