As one who previously lived at Dolls Pt and still spends the odd overnight at Brighton, it is quite obvious that a number of the aircraft operating during the curfew make as much, if not more, noise than the jet aircraft that land just after 5:00am on 34L or depart just after 11:00pm on 16R.
Thankfully the old Fockers and Argosy's and those RR Darts that converted kerosene to noise, have long since departed!