As described in Figure 6, wavefields are characterized and described by several well known terms:
These terms completely characterize wavefields in space-time, frequency-space, and frequency-wavenumber. We can think of wavefields as actually being the sums of sinusoidal style waves having the general form of Equation 3, where A = A ( x;y;z;ω = 2 πf ) is a positive amplitude as a function of spatial position ( x;y;z ) and frequency, and φ =