Navigating function graphs with audio: an investigation into the narratives of a blind expert using Audiofunctions.

This study examines Audiofunctions (AF), a multimodal interactive digital artifact designed to represent graphs of real-valued functions of a real variable. AF displays function graphs and uses sonification to represent the coordinates of a moving point as the independent variable changes. The paper discusses key theoretical considerations underlying the design of AF, related to a covariational perspective on functions and function graphs. Using a commognitive perspective, it analyses the case of an adult blind user, an expert in mathematics, in interaction with AF. The study investigates the narratives she produces, the function realizations involved other than the auditory one, and how they are related to the function characteristics, providing insights into the potential impact of AF.