Noise, uproar. (Merriam – Webster)
Confusion, turmoil. (Merriam – Webster)
A loud, confused noise, as of many voices: (Dictionary.com)
A loud noise, especially caused by a lot of people all talking at the same time. (Cambridge Dictionary)
General excitement and activity. (Cambridge Dictionary)
A hubbub is a noise made by a lot of people all talking or shouting at the same time. (Collins Dictionary)
Bringing order out of chaos: Psychometric characteristics of the confusion, hubbub, and order scale.
Making a noise vs creating a Hubbub.
Saturated fats: Why all the hubbub over coconuts?