equalisation

/ˌiːkwəlaɪˈzeɪʃən/
noun
  1. The process of making things equal or balanced, especially in terms of levels, amounts, or conditions.
    • The audio engineer used equalisation to balance the bass and treble in the recording.
    • The government introduced a policy of wealth equalisation to reduce poverty.
    • Equalisation of funding between schools is a major goal for the education board.