Vocalization or vocalisation may refer to:

• Speech, communication using the human voice
  • Vocable, an utterance that is not considered a word
  • Speech production, the processes by which spoken sounds are made
• Animal communication, the transfer of information from one or a group of animals to another
  • Amphibian vocalization
  • Bird vocalization, bird calls and bird songs
  • Dolphin vocalizations
  • Female copulatory vocalizations, produced by females while mating
• Voice (phonetics), the vibration of the vocal cords that accompanies some speech sounds
  • Consonant voicing and devoicing, the addition or removal of this vibration from consonant sounds
• Vocalization, the change of a sound into a vowel
  • L-vocalization, the change of the consonant [l] into a vowel or semivowel
• Vocal music, music performed by singers with or without instrumental accompaniment
• Non-lexical vocalization in music
• Speech disfluency, an utterance that interrupts the normal flow of speech

• Vocalization of consonantal text, the adding of vowels to a text written in consonants only
  • Arabic diacritics, symbols added to Arabic letters to represent vowels and consonant length
  • Niqqud, a system of diacritics to indicate vowel quality in Hebrew
    • Babylonian vocalization, a system of niqqud devised by the Masoretes of Babylon; defunct
    • Palestinian vocalization, a system of niqqud devised by the Masoretes of Jerusalem; defunct
    • Tiberian vocalization, a system of niqqud devised by the Masoretes of Tiberias; still in use

• Vocalise (disambiguation)