Noise
Din
noun
Boisterous sound is when there's a lot of noise around you. It's the din of the crowd or environment.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
騒音問題について、お隣さんにどうやって切り出したらいいんだろう。
How should I approach my neighbor about a noise problem?