Cacophonous (adjective)

1. Having a harsh, unpleasant, or discordant sound.
2. Lacking harmony or unity of sound.

Origin:

Late latin cacophōnus, from greek kakophōnos, from kak- + phōnē voice.

Examples:

1. The cacophonous noises of the construction site kept her awake all night.
2. The singer's cacophonous performance was met with boos and jeers.
3. The cacophonous music made his head hurt.
4. The cacophonous shouting from the protesters filled the streets.
5. The cacophonous mix of car horns, sirens, and shouting was overwhelming.