Labialization, velarization, aspiration, voicelessness and prenasalization are as in the IPA. In normal speech, the vocal folds alternate between states of voice and voicelessness. Thus, voicelessness of consonants is typically unmarked. Her work addresses history, voice and voicelessness, place, and identity. It appears that voicelessness is not a single phenomenon in such languages. Voicelessness is e.g. , as in the IPA. For example, indicates that voicelessness continues past the , equivalent to . In linguistics, voicelessness is the property of sounds being pronounced without the larynx vibrating.