It’s Rush’s printer.
It’s not his printer.
As annoying as his printer is, it is a short burst (15-20 seconds at a time) and has been going on for years.
This new noise runs for a longer period of time, 7-10 minutes then turns off then starts back up. Cycles on and off several times an hour. It only began last week.
I listen to the show every day it’s on.
Been doing so since his first day on WABC radio in New York.