This is something I have suggested to Bewley. They have an acoustic supply chain partner who theoretically could use an acoustic camera to pinpoint the source of the sound. Despite our suggestions, they have disregarded them.
It sounds like the noise is coming from the corner of the kitchen, close to the fridge and cupboards. There's a partition wall behind with metal studs, maybe with flat bars holding the plasterboard together. It's strange that if the noise is from the wall or ceiling, it would sound muffled, don't you think?
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