Modulation is the process of varying one or more properties of a high-frequency periodic waveform.

Look up modulation, modulate, or modulator in Wiktionary, the free dictionary.

Modulation, Modulations, Modulate, and Modulator may also refer to:

• Modulation (European Union), an authorized reduction in direct aid to producers

• Immunomodulation therapy
• Neuromodulation (disambiguation)

• Modulation (music), a change of key
• Modulating subject, a fugue subject which modulates
• Ring modulation, a signal processing function use by synthesizers or effects units
• Modulate (band), UK electronic band
• The Modulations, 1970s American band
• Modulation (music radio program), a weekly music radio program, broadcast via Jefferson Public Radio.
• Modulations A History of Electronic Music by Peter Shapiro, 2000 accompanying book to 1998 documentary

• Federal Signal Modulator, a civil defense siren

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