NDLI: Discrimination of Vowels with a Multi-finger Tactual Display

Content Provider	IEEE Xplore Digital Library
Author	Israr, A. Reed, C.M. Tan, H.Z.
Copyright Year	2008
Description	Author affiliation: Purdue Univ., West Lafayette (Israr, A.)
Abstract	The present study compared the performance of an ideal observer and a human participant in a vowel discrimination task using a speech-to-touch coding scheme designed for a three finger tactual display. The coding scheme extracted speech features and presented them as high-frequency vibrational and low-frequency motional waveforms. The high-frequency vibrations presented crude spectral information from three distinct speech bands on three fingerpads of the left hand. The same information was presented, redundantly, by the low-frequency waveforms. Performance of the ideal observer, where only high-frequency vibrational signals were considered, was evaluated by a signal detection theory using several tokens of a pair of vowels. Results showed that the acoustic cues corresponding to the first two formants were sufficient for discrimination of a seven vowel stimulus set. The participant was then tested in an absolute identification task with 640 tokens of ten non-diphthong vowels spoken by two female speakers. Both high- and low-frequency waveforms were presented to the participant. Discrimination scores for each pair of vowel were similar to the best scores obtained with the ideal observer indicating that the coding scheme was effective and the participant acted like an ideal observer.
Starting Page	17
Ending Page	24
File Size	662344
Page Count	8
File Format	PDF
ISBN	9781424420056
DOI	10.1109/HAPTICS.2008.4479907
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-03-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Displays Speech Haptic interfaces Laboratories Humans Fingers Feature extraction Oral communication Skin Vibrations psychophysics H.5.2 [Information Interfaces and Presentation]: User Interfaces ¿ Haptic I/O H.1.2 [Models and Principles]: User/Machine Systems ¿ Human factors sensory substitution vowel discrimination tactual sense detection thresholds
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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