Heard Concorde take off on numerous occasions. It was loud, very loud, growing every other engine noise around it. I also lived on the English south coast for a few years, and every night, at around 9pm there would be an intense, window shaking but not too loud boom from the channel, around 40 km away, as Concorde passed the sound barrier. Given that Concorde was probably in mid channel, around 40 km from the shore, the boom must have travelled 80 km or so. No engine noise from that.
So my take is that even if you reduce it to a thump, it will still shake windows, set off car alarms and upset people on the ground. Like living in a mining town when they blast. Many miners do not live near where they work, for that reason.