Pure tone audiometry only tell us about auditory status where speech audiometry provides information about ability to hear and understand speech, comfort and discomfort levels.
It is a minimum level in dB at which listener is aware of speech
It is the level on which listener identifies correctly 50% of the Spondee words presented.
It is the percentage score which listener correctly repeats from PB words presented
It is the hearing level at which listener experiences speech to be most comfortable
It is the hearing level at which listener experiences speech to be uncomfortably loud.