Hearing is our most pervasive and deeply rooted sense. We have been hearing since we were 41/2 months old... before being born! Hearing provides the brain with 80% of its sensory stimulus. The ear is connected to all parts of the body, with direct control of the muscles. This makes sense from an evolutionary biology point of view... the ear is the first alarm system, and when a certain noise indicates a threat, the body should respond (flee) as instantly as possible. The connection of the ear to the voice is, for a social creature like humans, obvious: as we respond to an auditory stimulus, we also give voice to a pitched cry.
Singers are sonic artists. To sing, we must hear well, listen skilfully and interpret accurately
The ear is the primary organ of singing.