Cacophony (noun)

1. A harsh, discordant mixture of sounds.
2. A discordant and meaningless mixture of sounds.

Origin:

From new latin cacophōnia, from greek kakophōnia, from kak- (bad) + -phōnia (voic.e)

Examples:

1. The city was filled with a cacophony of honking cars and sirens.
2. The band's music was a cacophony of noise that made it impossible to understand the lyrics.
3. The cacophony of voices in the crowded room made it difficult to hear each other.
4. The cacophony of birds singing at dawn was beautiful.
5. The cacophony of construction sounds outside his window kept him awake all night.