What does modulate mean?
To modulate is to adjust, regulate, or vary something in a controlled way. The word is especially useful for describing changes in voice, sound, light, speed, temperature, style, or signal behaviour. A speaker might modulate her tone to express doubt or emphasis, while a musician may modulate tempo or volume to create a particular effect. In electronics and telecommunications, modulation has a more technical meaning: a signal’s frequency, phase, or amplitude is varied according to an information-bearing signal. The word therefore suggests deliberate, controlled variation rather than an abrupt or random change. Its formal and technical character distinguishes it from more general words such as alter or adjust, while preserving the idea of changing something within specific limits or according to a guiding pattern.
verbTo adjust or regulate something, especially by varying its degree, intensity, pitch, or frequency. In signal processing, to vary a periodic waveform in accordance with a controlling signal.
- To adjust or regulate the degree, intensity, pitch, quality, or other characteristic of something.
- To vary a periodic waveform or signal in accordance with another signal or control process.
"The speaker could modulate her voice to emphasize the warning."
"The musician subtly modulated the tempo to create tension."
"The transmitter modulates the carrier signal according to the incoming audio."
From a Latin word meaning “to measure,” modulate originally referred to regulating something according to a measured scale.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does modulate come from?
The English word derives from Latin modulari, meaning “to measure” or “to regulate according to a measure.” It is related to modulus, from the Latin modulus, meaning “small measure” or standard of measurement. The same Latin family gives English words such as module, modular, and modulation.
Related word forms
How modulate is actually used
The verb is formal or technical in many contexts, though it is also used in discussion of speech, music, style, and behaviour. In engineering and telecommunications, it commonly describes changing one property of a signal in relation to another.
Easily confused with modulate
To moderate something is generally to keep it within reasonable limits, whereas to modulate something is often to vary or adjust its degree, pitch, intensity, or signal properties.