@overwork
I can hear those bloody alarms that people have to stop cats from coming into their gardens. Apparently only cats can hear it. And me. My daily walks are punctuated with me squirming as I walk past certain houses as it's such an irritating noise. While the bastarding none affected cats sit on said gardens and laugh
We tried playing one of those high pitched noises through youtube... before I could ask DH if he could hear the annoying whine, the DCs were recoiling and groaning in horror
I'm not sure if BiL still has his cat sensors or if I'm just getting older. I think he had to get rid for his kids. I'm younger than DH & co so would be the only one noticing it during the welcoming/ parting greetings.