Wave shoaling and the angular frequency is proportional to its local rate of change, Simplifying to one dimension and cross-differentiating it is now easily seen that the above definitions indicate simply that the rate of change of wavenumber is balanced by the convergence of the frequency along a ray; Assuming stationary conditions (formula_27), this implies that wave crests are conserved and the frequency must remain constant along a wave ray as formula_28. As waves enter shallower waters, the decrease in group velocity caused by the reduction in water depth leads to a reduction in wave length formula_29 because the nondispersive shallow water
The Crests group continued as a trio of Carter, Ancrum, and Lewis and became a lounge act, disbanding in 1978. Carter went to sing with Charlie Thomas' Drifters for a year, then moved to Plainfield, New Jersey, to teach voice and set up his own recording studio. In 1973, Carter met his wife Leona, an accomplished classical pianist/composer. Leona Carter has been a part of The Crests since then. Carter reformed The Crests in 1980, auditioning over 200 singers at his studio, finally settling on lead Bill Damon (a Maestro sound-alike), Greg Sereck, Dennis Ray and New York drummer, Jon Ihle. The