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ERIC Number: EJ1159672
Record Type: Journal
Publication Date: 2017-Jul
Pages: 4
Abstractor: As Provided
ISSN: ISSN-0021-9584
The Sound and Feel of Titrations: A Smartphone Aid for Color-Blind and Visually Impaired Students
Bandyopadhyay, Subhajit; Rathod, Balraj B.
Journal of Chemical Education, v94 n7 p946-949 Jul 2017
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.
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A