The way to solve the noise problem is to prohibit the use of HDB void decks for weddings, funerals or any organised/religious activities irrespective of race, religion or politics (political party)-including burning of joss papers.
The govt with its billions can easily fund purpose build centres for such activities-like what the Community Centres is used now for many events. It can build affordable funeral, religious and social centres in each neighbourhood preferably blocked/shielded by bus terminus/carparks or commercial buildings so that residential areas can be quiet.