People living under the proposed flight paths will suffer 4 planes EVERY NIGHT @ 60 dB.
Background noise in the Mountains and many areas of Western Sydney is less than the city. So this noise will seem even louder compared to the same plane at the same height in Sydney.
70 decibels: interrupts conversations in the room or on the phone, you can’t hear the TV
50 decibels: will wake you up
Figure adapted from: Australian Government (2013). Your Home. Australia’s guide to environmentally sustainable homes.