Method and apparatus for dithering and undithering data words in a data stream. The heat transfer fins project outwardly from the wireless communication device, receive heat produced by electric components of the wireless communication device, and transfer heat to air passing the heat transfer fins. The particular component concentration chamber is capable of increasing concentration of the particular component by allowing permeation of the particular gas through the separation membrane. Based on the result of comparison, the amplitude peak is either deemed an actual cardiac beat, or otherwise is deemed noise. The write data is transferred to the shared memory and matched, within the shared memory, to the write request address.