modulation.

1. A controlled change in a signal or sound to encode information or alter its character.

2. A transition from one musical key to another.

Use it for

Words that belong together

• frequency modulation
• voice modulation

On the page

Voice modulation helped distinguish the recorded instructions from background noise.

Usage notes

Primary category: sci-fi. Forms: Usually uncountable; no ordinary plural in this sense. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: description, technology. Commonness: moderately common.