Dynamic Ranges are volume regions. These volume regions are perceived in relationship to one another.
Default 2
A loud section sounds louder, when there are other sections that are softer. Soft sections sound softer, when louder sections are present. 
Each Dynamic Range is written using letters, which are abbreviations for the Italian words they come from.
Let’s begin with the two most common Dynamic Ranges.
Piano is Italian for Soft, Plain or Subdued.
Forte is Italian for Strong or Loud.
Default 8
Default 1

Over 1,400 multimedia pages – best viewed on computer or tablet