My unit [is] company title in Victoria
Check your company documents (by-laws, rules, whatever) to see if there is anything about excessive noise. You probably don’t need an acoustic certificate – just evidence of noise penetration which you can get from stat decs from visitors or recordings using the Snooper software.
But be warned, as a company title this probably doesn’t come under strata law in Vic. It’s company law in NSW which is a whole other legal minefield.