sounded like "coil wine". doesnt stop a phone app decoding it though. it was only when i moved the mouse. and came then went. And i definately still have reas

sounded like "coil wine". doesnt stop a phone app decoding it though. it was only when i moved the mouse. and came then went. And i definately still have reasonable high frequency hearing. for example filing a complaint with Morisons in the UK for those high frequency speakers aimed at stoppping kids loitering. Don't know if they got rid of them or not because i stopped shopping there.