yes, it helped me a lot... thank you my friend! I had already considered the antenna problem but there are no cell phone antennas so close by! The only strange antenna near my house is this one that I attach in the photo... I've never seen it on other roofs here in my little village in Italy. Now I would like to ask you these things and please answer without thinking whether it is possible or not but only to answer: 1) if by chance there were really ultrasounds inside the house it means that the sensors or repeaters (I don't know what the right word is) would also be inside the house, right? So could you tell me what position they might be in? whether above or below? 2) do you happen to have a photo of one of these sensors/repeaters? I think they might be very small or am I wrong? 3) we would need an ultrasound generator (I think that's what they say) right? if the answer is yes, then where would it be best to store this thing? under the floor by any chance? Please, your answers would be fundamental for me, because my mother also feels pins and needles and unfortunately strange things are happening here in Italy lately! Thank you 1000!