Even though sound waves in water and sound waves in air are basically similar, the way that sound levels in water and sound levels in air are reported is very different, and comparing sound levels in water and air must be done carefully.
Melanocytes are found in the stratum basale layer. About 1 in every 5 to 10 cells in this layer is a melanocyte. Melanocyte number is the same in all races. In different races, the number of melanocytes is THE SAME. In light skinned people, the melanin is concentrated deep in the epidermis, particularly in the stratum basale layer. Differences in skin colour depend on how much melanin is produced, the size of the melanosomes, and the degree to which they agregate.
Melanin granules synthesized in the melanocytes are then transferred from the cytoplasm of the melanocytes to the basal cytoplasm of the keratinocytes. In the human epidermis, melanocytes work in close harmony with their neighbouring cells such as keratinocytes via their dendrites.