| cross talk |
interference, as on a telephone, radio, or other electronic receiver, by other sound or radio signals from another channel. [1/2 definitions] |
| crystal detector |
a simple radio receiver made of a semiconducting crystal touched by a fine wire. |
| crystal set |
an early form of radio receiver that used a crystal detector. |
| deejay |
one who plays recorded music and provides commentary over the radio or at an event or venue; disc jockey; DJ. |
| dial |
the mechanism of a television or radio for tuning to different channels or wavelengths. [1/8 definitions] |
| dipole antenna |
a radio or television antenna consisting of two equal rods that extend outward in opposite directions. |
| directional |
sending or receiving radio signals in one or more specific directions. [1/3 definitions] |
| direction finder |
a device for ascertaining the direction of incoming radio waves or signals, consisting of a loop antenna that rotates. |
| disc jockey |
one who plays recorded music and provides commentary over the radio or at an event or venue. |
| dish antenna |
a radio antenna with a round, concave reflector, used to receive or send satellite and microwave signals. |
| DJ |
one who plays recorded music and provides commentary over the radio or at an event or venue; disc jockey. [2/3 definitions] |
| drone1 |
an aircraft or other similar unmanned device, whose movements are controlled at a distance, as by radio, often used for purposes such as aerial photography, delivery of supplies or necessities, fire fighting, and military attack from the air. [1/3 definitions] |
| earphone |
the part of a telephone, radio set, music player or the like that fits over or into the ear for receiving sound. |
| E layer |
a thick layer of ions located at a height of about sixty to ninety miles in the E region of the earth's outer atmosphere and having the ability to deflect radio waves. |
| electromagnetic spectrum |
the entire range of electromagnetic frequencies from radio, the lowest, to gamma rays, the highest. |
| electromagnetic wave |
a wave that contains a magnetic and electric component and that is created by an accelerating electric charge, such as a radio wave, x-ray, or light. |
| FCC |
abbreviation of "Federal Communications Commission," a U.S. agency whose duty is to regulate the various communications industries including telephone, radio and television, and satellites. |
| Federal Communications Commission |
a U.S. agency whose duty is to regulate the various communications industries including telephone, radio and television, and satellites. |
| flight control |
the guidance and direction given to an aircraft by radio from a ground facility. |
| FM |
a system of varying a radio signal's frequency so as to impose the signal on a carrier wave; frequency modulation. [1/2 definitions] |
| galactic noise |
radio waves originating from within the Milky Way. |