Ah! Just last week I acquired and used a Garrard turntable for next to nothing, to use as a prop for the lyrics video of my band's next song, due next Friday.
I saw a programme about Star wars last night, the props guy bought some old flash bulb holders from a photographic shop and with a few add ons made them into the light sabres.
Regarding the OP I too had well over a week of intermittent low frequency noise where I live. I posted it on our village’s Facebook page but no one else got back to me. I don’t think I was imagining it though.