Sonication

As sonication ( lat. Sonorus "ringing") or Lenition (lat. Lenis 'mild') is in linguistics the conversion of a voiceless ( "hard") into a voiced ( 'soft') consonants called such. B. / p / to / b /, / t / to / d / or / k / to / g /.

Disapproval is the opposite phenomenon. It can be found e.g. B. in Spanish and is referred to in this context as Castilian disonorization .