An electric egg beater or hand-held blender running in a glass bowl, beating egg whites and sugar. Steady.
Garbage disposal grinding wet food
Recording of a blender turned on and off several times
80's Oster blender filled with water.
The sound of my iPhone.
This is a large door with an industrial, metal doorknob opening at a normal pace.
I opened and closed the door of my room.Very simple!:)
Knocking on my door and opening it.
Five somewhat quiet knocks on a medium sized door. Even though I didn't knock on it that hard, it still ...