A microphone in which sound waves vary the resistance of a pile of carbon granules. May be single-button or double-button.

A microphone common to older telephones. Carbon microphones require no power source other than line power in order to operate. Cascade 1) Successive stages, processes, or functions that are directly caused by input from a preceding stage, process, or function. 2) A series of virtually identical interconnected electronic devices such as small telephone systems or stackable network hubs. Cell In wireless telephone applications, a cell refers to the geographical area within range of the transmitter/receiver antenna (or cell site) covered by a service provider's cell site.

A microphone which depends, for its operation, on the variation in resistance of carbon granules.