My two males come running to the sound of a squeaky toy.  They do not
react negatively at all.  In fact, I use it when I need them to come out
of where they are hiding.  They get a treat for responding sometimes.
The females respond sometimes too, but seem less affected.
 
In fact, when I got my first ferret many years ago, it was suggested that
I train him to respond to this so I would not "lose" him.
 
CEM and the clan
[Posted in FML issue 4378]