a person drags a metal chair across the wooden floor creating a loud scraping sound. The chair legs screech against the floor planks as sparks of irritation seem to radiate outward. The harsh noise cuts through the previously peaceful atmosphere like a knife. Multiple library visitors around nearby tables wince and cover their ears in obvious discomfort. Some readers look up from their books with annoyed expressions and furrowed brows. Others shake their heads in frustration at the disturbing interruption. a harsh, irritating effect on everyone's senses