| 摘要 |
<p>Blocks (20) interlock at cutouts (24) to form a row of blocks. Waves with wave crests (44) propagate in the direction of arrow A towards the blocks. When the waves impact the row of blocks (20), the alternating peaks and troughs formed by the edges (22), facets and steps of blocks (20) cause reflection of the waves from a plurality of point sources such that the reflected waves have circular wave fronts (46). The wave interference of the circular wave fronts (46) in the regions shown by reference numeral (48) results in a phenomenon known as near field diffraction. Circular wave fronts (46) also interfere with waves (44). This reduces the wave intensity impacting the blocks.</p> |
