What does modulator mean?
A modulator is something that regulates or varies another process, signal, or form of communication. Its most established technical use is in electronics and telecommunications, where it is a device or circuit that changes a property of a carrier wave—such as frequency, amplitude, or phase—to encode information. Modulators also occur in audio technology, where they alter characteristics such as frequency and amplitude to shape a sound. In more general usage, a person or organization described as a modulator moderates the behavior, expression, or effect of something else. The word is formal and more common in technical writing than in everyday conversation, where a controller, regulator, or adjuster may sound more natural. Understanding the term is especially useful in radio, sound engineering, signal processing, and discussions of systems that regulate communication or behavior.
A device or component that varies a property of a signal, especially a carrier wave, to encode or transmit information.
"The modulator changes the frequency of the carrier wave in response to the audio signal."
Used chiefly in electronics, telecommunications, radio, and audio engineering.
A person, organization, or system that moderates or regulates something by adjusting its behavior or effect.
"The committee was viewed as a modulator of public opinion."
This broader sense is formal and less frequent than the technical electronics sense.
The plural is used for multiple devices, people, organizations, or systems that perform a modulating function.
"The manufacturers designed new frequency modulators for the radio equipment."
A modulator is the invisible intermediary that makes a signal carry meaning, from radio waves to the human voice.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does modulator come from?
The word derives from Latin modulari, meaning “to measure according to a mode” or “to modulate,” which comes from modulus, a diminutive of modus, meaning “measure” or “manner.” English adopted the family through the verb modulate, and modulator was formed as the corresponding agent noun for a device or thing that performs modulation. Related English words include module and modular, preserving the same Latin root.
Related word forms
How modulator is actually used
The technical sense is common in electronics, telecommunications, and audio engineering. The broader sense—someone or something that moderates or regulates—is less frequent but standard in formal contexts.
Easily confused with modulator
A modulator varies or adjusts a signal or other controlled quality, whereas a moderator manages discussion or mediates between people.