Depth perception

"...even Marx understood that 'technologies created ways in which people perceive reality, and that such ways are the key to understanding diverse forms of social and mental life.' Not only did technology change the aural experience of social life, encouraging active manipulation of sound and enlarging the concept of aural architecture, but it also influenced spatial cognition, sensory perception, and social dynamics. The industrial revolution was also a sensory awareness revolution." From spaces speak, are you listening? by barry blesser and linda-ruth salter. Image above is Hogarth's Enraged Musicians.