CHAPTER 1Theoretical Acoustics
Wave Theory
“Wave theory? We don’t need no stinking wave theory!”
Don’t worry, we are not going to get too technical right off the bat. Waves are simply a means of transferring energy from one place to another. Sound energy, once initiated, travels in all directions meaning three dimensionally.
Now the wave surface, which indicates where a pressure change has gotten to at a particular time, will, in anechoic or free-field conditions (that is without any acoustics involved), be spherical (see Fig. 1.1).
FIGURE 1.1 Sound waves are spherical.
Imagine two people sitting on the top of two poles a mile up in the sky, as ...
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