If you will live in the countryside? I'm not being funny in anyway at all, but the countryside is a living working place.
Without the bird scarer the farmer wouldn't have any crops to harvest and the woodpigeons also so play havoc with cerial crops. They taste pretty scrummy too. Gets tin hat on and retires to bunker for the duration.
Maybe it's because it's so nice and quiet that the bird scarer is so intrusive. I'm sure there are louder sounds in town, but I don't live there so I don't really know and I have absolutely no desire to find out. Over the gate - I just want a MOAN

I've spent all my life within range of birdscarers and they don't get any better
Colliewobbles - our instrument of mass torture goes off every couple of minutes, but is mercifully on the opposite side of the field. Could you perhaps ask your neighbour to reposition his so it points at rightangles to your place? If it points towards you or directly away then it seems to sound louder.
Of course the farmers have to protect their crops, as I said - but it doesn't stop it being annoying

I know just how much our neighbour has spent getting that seed sown, how much he will have to spend to bring it to harvest, then what it will be worth - so it's a huge investment. I don't mind the scarer being used - I just wish a quieter method worked. My neighbour has put up a very pathetic attempt at a scarecrow - which had the inevitable rook perched on it, but that is never going to protect a thirty acre field. I suppose if he used flashing lights to scare the birds it would be even more annoying and we'd all have migraines
Everywhere has its drawbacks - bird scarers happen to be my least favourite here.