a mixture of loud, unpleasant sounds
cacophony - noise
The word ‘cacophony’ is used to express loud, confusing, and disagreeable sounds. It can come from a chaotic mixture of different things, or the repetitive drone of similar things, such as car horns. It is in many ways the opposite of ‘symphony’.
The motorway was jammed this morning as I went to work. All around I could hear a cacophony of car horns.
Construction work went on outside my window every day last week. It was a cacophonic nightmare!
I thought the band were awful. To me, the whole concert was just a cacophonous mess.