Meaning of MODULATION in English

noun Date: 1501 an inflection of the tone or pitch of the voice, a regulating according to measure or proportion ; tempering, a change from one musical key to another by modulating, the process of modulating a carrier or signal (as in radio)

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.