by Sonja Sharp, Los Angeles Times/TNS | February 19, 2021 Lynn Wu checks to make sure the Brailler is ready before her Braille Challenge finals test. (Irfan Khan/Los Angeles Times/TNS) LOS ANGELES — The challenger sat alone at a square folding table in the center of her teacher’s immaculate living room, stockinged feet whispering against the plush, white carpet, hands poised over a blue Perkins Brailler — something like a manual typewriter crossed with a court reporter’s steno machine. To say the Brailler is loud is an understatement. The force required to emboss Braille paper produces a noise less like typing and more like repeatedly firing a BB gun.