Pulse-density modulation
= Pulse-density modulation
{wiki=Pulse-density_modulation}
Pulse-density modulation (PDM) is a form of modulation used to represent an analog signal with a binary signal. In PDM, the density of the pulses corresponds to the amplitude of the analog signal being represented. Essentially, the more frequent the pulses occur in a given time frame, the higher the average value of the analog signal.