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.
Melanocytes are the cells that synthesize pigment. Through a series of enzymatic reactions these cells efficiently produce melanin pigment that determines skin color. Once it is formed, melanin is packaged into tiny vesicles called melanosomes. The melanocyte has tiny tentacles that it uses to transfer melanosomes to other skin cells. It is interesting to note that dark-skinned patients do not have more melanocytes but instead have melanocytes with more pigment producing power.