A fundamental prerequisite for the social coexistence of any human group is the ability to communicate among its members. The more comfortably they communicate, the more cohesive their society is.

In developed societies, the most significant contact among their members occurs when the highest characteristic that distinguishes them from other animals, their advanced reasoning, is communicated. This communication is expressed directly through spoken language and indirectly through written language.

Spoken language, whose carrier is the voice, therefore offers the greatest capacity for direct communication among people when the superior trait, reasoning, is conveyed. This fact makes the voice indispensable to the social being.

It is not only the loss of it that creates obstacles, but also the slightest imperfection, which can often put one in a difficult position or earn them the title of 'incomprehensible'.