Hi, if you’re in Sydney I can recommend an acoustic engineer in North St Marys (think they’ve moved from Drummoyne) and I sympathise. The building standard of 62dB is woefully inadequate in most buildings (carpet with good underlay is rated at 39dB). It might be a good idea in the first instance to visit your neighbours but if they’re anything like the herd of elephants (5 in total) above me….. Sadly my neighbours are intimidating bullies and the children are being brought up the same. Good luck