| 摘要 |
<p>The invention relates to a method of generating sound which includes providing a road surface (12) configured such that a vehicle wheel driving over the road surface (12) generates a predetermined sequence of sounds. The sequence of sounds may be a melody. The method may include providing irregularities in the form of ribs or ridges which extend transversely relative to the intended direction of travel of a said vehicle wheel and which are longitudinally spaced apart on the road surface to generate the sequence of sounds. The irregularities may be arranged in longitudinally spaced apart sets, each set comprising a plurality of longitudinally spaced apart irregularities configured to generate a predetermined sound of predetermined duration when a vehicle wheel travels over the ridges at a predetermined speed. The invention extends to a method of arranging rumble strips on a road, to a road, to a rumble strip arrangement and to a portable sound generating device.</p> |
