Did you know coffee beans grow on a tropical evergreen plant? It grows between the Tropics of Cancer and Capricorn, in the South and Central Americas, Africa and parts of Asia. Also known as the Bean Belt.
Melitta Bentz did not only invent the paper coffee filter, thanks to her son's blotting paper, she was also the namegiver to the family-owned company, who still sell paper coffee filters.
Also, it is better not to use boiling water (100℃/212℉) but use water just below that (between 91℃/195℉ and 96℃/205℉) the closer you can get to 96℃, the better. Using boiling water burns the coffee.
That lovely gurgling sound - and more - explained in this animation on drip coffee machines. The classic coffee maker seen all around.