* Abstract noun: When referring to the sound produced by the vocal cords, it's an abstract noun, representing a concept rather than a physical object.
* Concrete noun: When referring to a specific person's way of speaking, it becomes a concrete noun, as it represents a unique characteristic of that person.
* Collective noun: When referring to a group of people expressing an opinion or a point of view, it can be considered a collective noun.
Therefore, the type of noun "voice" is determined by the context and how it's used in a sentence.