No. I mean it could be, but the dog heard it. It whimpered, and pawed its head.

You know, the dog whistle. Only a dog hears the pitch, otherwise it sounds not very loud to us. Imagine an electrical whir or hum, hitting your inner ear, like that dog whistle. Except all the other sounds are still there, but there's this whirring getting more intense, shril, piercing. Not an air raid siren, or a cunt blowing a fog horn as you're sat at the computer. Just an electrical whir, hum. No I am not deaf, or have hearing problems, my ears are very good, very good, indeed. But occasionally not quite yearly, maybe every few, there it is, and it often lasts for a few minutes. At different times, once at late night, once daytime, etc. It is something electrical.