Here are some examples of how you might use the word:
* "The city was a cacophony of honking horns, sirens, and construction noise."
* "The band's music was a cacophony of dissonant chords and jarring rhythms."
* "The classroom was filled with the cacophony of children's voices."
Essentially, "cacophony" paints a picture of unpleasant, jarring sound, often suggesting a lack of order or control.