No, you do not necessarily need an ear to hear your own vocalizations. While the ear plays a crucial role in the normal process of hearing, it is not the only way we perceive sound.
When we speak or make vocalizations, sound is produced through vibrations of the vocal cords, which create audible waves in the surrounding air. These sound waves can be detected not only by our ears but also by other parts of our body, such as bones and tissues.
This is known as bone conduction, where vibrations are transmitted through bone structures to reach the inner ear. In this way, even if you do not have a functional outer or middle ear, you may still perceive some level of sound through bone conduction.
However, it is important to note that the perception of sound without a functioning ear can be limited and may not provide the same level of clarity and detail as hearing through the normal auditory pathway.