Except quiet whistling no taint!

The only drawback is that every time he "thinks", that has just finished a printing process, this is a receive etc., that is in phase between work and rest, he is a Fiep / whistle of itself. That would now not have to be, but it is now not so bad that you could not live with it.
Who is very sensitive to such things, the more it might interfere. Maybe it's just my particular instance, who knows.