In my experience people do not usually cause a nuisance on purpose, so your first approach should be to speak with your neighbours about the problem.
If the noise disturbance persists, advise your neighbours that (in NSW) Strata By-Law #1 states:
An owner or occupier of a lot must not create any noise on a lot or the common property likely to interfere with the peaceful enjoyment of the owner or occupier of another lot or of any person lawfully using common property.
A Breach of this and any other Strata By-Law may be addressed by your Executive Committee and/or Strata Manager who can issue a written “Notice to Comply”, after which punitive actions may be applied by application to the Consumer, Trader, and Tenancy Tribunal (again in NSW).