superhet

/ˈsupərˌhɛt/
noun
  1. Short for superheterodyne; a type of radio receiver that mixes incoming signals with a locally generated frequency to produce a fixed intermediate frequency for better reception.
    • The technician explained how the superhet works by converting signals to a lower frequency.
    • Most modern radios use a superhet design because it reduces interference.
    • My grandfather's old radio is a superhet, and it still picks up stations clearly.