your brain and ultrasonics

[blastawaycas]

how does this work.........we all have cars vans motorcycles with alarms and keyless entry systems....if you are approaching your vehical and press your "blipper", and are out of range (it does'nt work) place the fob to your head and look at your vehical it operates the alarm / central locking or deactivates it ...whatever you are trying to do, i have purposely went out of range of my car pointed the fob pressed....nothing put it to my head ...it works, now experimenting a little more i got one of my border collie dogs to sit put the blipper to his head nothing tried the other border collie we have (tilly a bitch) and it worked every time but with tarn (the dog ) does'nt flicker....any thoughts or ideas, thankyou