Systems
A
system is a function that maps one function space into another.
For example, given the
function spaces:
-
Sounds = [Time → Pressure]
-
Images = [HorizontalSpace ×
VerticalSpace → Intensity
3]
an audio equalizer, which adjusts the tonal balance of an audio signal,
is a system:
-
Equalizer: Sounds →
Sounds.
A room is also such a system. Consider how a cathedral transforms
a sound, compared say to an acoustically dead room like one with carpeting
all over the walls. In fact, equalizers are often used to correct sounds
that are distorted by rooms (the equalizer and room are
composed
to become one system).
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