Frequency mapping

A sonification technique that encodes spatial position or data values as changes in audio frequency (pitch), creating an intuitive correspondence between vertical position and pitch height — low positions produce low-frequency sounds and high positions produce high-frequency sounds. Frequency mapping is widely used in accessibility applications for conveying graphical information non-visually, such as representing y-axis values in charts, vertical position of shape boundaries, or elevation in maps. Research shows that continuous frequency mapping using pure or filtered tones is generally more intuitive and faster to interpret than discrete note-based or natural instrument approaches.