Abstract

An Android-based application has been developed to provide color-blind and visually impaired students a multisensory perception of color change observed in a titration. The application records and converts the color information into beep sounds and vibration pulses, which are generated by the smartphone. It uses a range threshold of hue and saturation coordinates of the HSV (hue, saturation, value) color space for detecting a color change specific to an indicator for, e.g., shades of pink for phenolphthalein-based titration, and informs the users before and upon attaining the end point. This approach can enable color-blind and visually impaired students to actively perform a fairly routine laboratory activity of titration.

Citation

Bandyopadhyay, S. & Rathod, B.B. (2017). The Sound and Feel of Titrations: A Smartphone Aid for Color-Blind and Visually Impaired Students. Journal of Chemical Education, 94(7), 946-949. Retrieved August 10, 2024 from https://www.learntechlib.org/p/192206/.

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Keywords

• assistive technology
• Blindness
• chemistry
• Color
• Handheld Devices
• Laboratory Experiments
• Multisensory Learning
• Science Activities
• Secondary School Science
• Sensory Aids
• teaching methods
• Technology Uses in Education
• Visual Impairments