51 relations: Acoustic wave, Alexanderson alternator, AM broadcasting, Amateur radio, Amplifier, Amplitude modulation, Audio power amplifier, Audio signal, Biasing, Candlestick telephone, Carbon, Chemical industry, Cliff effect, Continuous wave, Current divider, David Edward Hughes, Diaphragm (acoustics), Direct current, Electric current, Electrical resistance and conductance, Electromagnetic pulse, Emile Berliner, Explosion, Frequency response, Gain (electronics), Lightning, Metal, Microphone, Mining, Modulation, Noise (electronics), Nuclear explosion, Oscillation, Party line (telephony), Plain old telephone service, Pressure, Public address system, Reginald Fessenden, Repeater, Royal Society, Shure, Sound, Sound quality, Telephone exchange, Telephony, Third World, Thomas Edison, Transducer, Transmitter, Vacuum tube, ..., Voltage. Expand index (1 more) » « Shrink index
Acoustic waves (also known as sound waves) are a type of longitudinal waves that propagate by means of adiabatic compression and decompression.
An Alexanderson alternator is a rotating machine invented by Ernst Alexanderson in 1904 for the generation of high-frequency alternating current for use as a radio transmitter.
AM broadcasting is a radio broadcasting technology, which employs amplitude modulation (AM) transmissions.
Amateur radio, also known as ham radio, describes the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport, contesting, and emergency communication.
An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal (a time-varying voltage or current).
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting information via a radio carrier wave.
An audio power amplifier (or power amp) is an electronic amplifier that reproduces low-power electronic audio signals such as the signal from radio receiver or electric guitar pickup at a level that is strong enough for driving (or powering) loudspeakers or headphones.
An audio signal is a representation of sound, typically as an electrical voltage for analog signals and a binary number for digital signals.
Biasing in electronics means establishing predetermined voltages or currents at various points of an electronic circuit for the purpose of establishing proper operating conditions in electronic components.
The candlestick telephone is a style of telephone that was common from the late 1890s to the 1940s.
Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.
The chemical industry comprises the companies that produce industrial chemicals.
In telecommunications, the (digital) cliff effect or brickwall effect is a sudden loss of digital signal reception.
A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency, almost always a sine wave, that for mathematical analysis is considered to be of infinite duration.
In electronics, a current divider is a simple linear circuit that produces an output current (IX) that is a fraction of its input current (IT).
David Edward Hughes (16 May 1831 – 22 January 1900), was a British-American inventor, practical experimenter, and professor of music known for his work on the printing telegraph and the microphone.
In the field of acoustics, a diaphragm is a transducer intended to inter-convert mechanical vibrations to sounds, or vice versa.
Direct current (DC) is the unidirectional flow of electric charge.
An electric current is a flow of electric charge.
The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.
An electromagnetic pulse (EMP), also sometimes called a transient electromagnetic disturbance, is a short burst of electromagnetic energy.
Emile Berliner (May 20, 1851 – August 3, 1929), originally Emil Berliner, was a German-born American inventor.
An explosion is a rapid increase in volume and release of energy in an extreme manner, usually with the generation of high temperatures and the release of gases.
Frequency response is the quantitative measure of the output spectrum of a system or device in response to a stimulus, and is used to characterize the dynamics of the system.
In electronics, gain is a measure of the ability of a two-port circuit (often an amplifier) to increase the power or amplitude of a signal from the input to the output port by adding energy converted from some power supply to the signal.
Lightning is a sudden electrostatic discharge that occurs typically during a thunderstorm.
A metal (from Greek μέταλλον métallon, "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard when in solid state, opaque, shiny, and has good electrical and thermal conductivity.
A microphone, colloquially nicknamed mic or mike, is a transducer that converts sound into an electrical signal.
Mining is the extraction of valuable minerals or other geological materials from the earth, usually from an orebody, lode, vein, seam, reef or placer deposit.
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted.
In electronics, noise is an unwanted disturbance in an electrical signal.
A nuclear explosion is an explosion that occurs as a result of the rapid release of energy from a high-speed nuclear reaction.
Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states.
A party line (multiparty line, shared service line, party wire) is a local loop telephone circuit that is shared by multiple telephone service subscribers.
Plain old telephone service or plain ordinary telephone service (POTS) is a retronym for voice-grade telephone service employing analog signal transmission over copper loops.
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
A public address system (PA system) is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment.
Reginald Aubrey Fessenden (October 6, 1866 – July 22, 1932) was a Canadian-born inventor, who did a majority of his work in the United States and also claimed U.S. citizenship through his American-born father.
In telecommunications, a repeater is an electronic device that receives a signal and retransmits it.
The President, Council and Fellows of the Royal Society of London for Improving Natural Knowledge, commonly known as the Royal Society, is a learned society.
Shure Incorporated is an American audio products corporation.
In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid.
Sound quality is typically an assessment of the accuracy, enjoyability, or intelligibility of audio output from an electronic device.
A telephone exchange is a telecommunications system used in the public switched telephone network or in large enterprises.
Telephony is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties.
The term "Third World" arose during the Cold War to define countries that remained non-aligned with either NATO or the Communist Bloc.
Thomas Alva Edison (February 11, 1847October 18, 1931) was an American inventor and businessman, who has been described as America's greatest inventor.
A transducer is a device that converts energy from one form to another.
In electronics and telecommunications, a transmitter or radio transmitter is an electronic device which produces radio waves with an antenna.
In electronics, a vacuum tube, an electron tube, or just a tube (North America), or valve (Britain and some other regions) is a device that controls electric current between electrodes in an evacuated container.
Voltage, electric potential difference, electric pressure or electric tension (formally denoted or, but more often simply as V or U, for instance in the context of Ohm's or Kirchhoff's circuit laws) is the difference in electric potential between two points.