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
Writing
- 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