Controller design and consonantal contrast coding using a multi-finger tactual display1
Identifieur interne : 000615 ( Pmc/Curation ); précédent : 000614; suivant : 000616Controller design and consonantal contrast coding using a multi-finger tactual display1
Auteurs : Ali IsrarSource :
- The Journal of the Acoustical Society of America [ 0001-4966 ] ; 2009.
Abstract
This paper presents the design and evaluation of a new controller for a multi-finger tactual display in speech communication. A two-degree-of-freedom controller consisting of a feedback controller and a prefilter and its application in a consonant contrasting experiment are presented. The feedback controller provides stable, fast, and robust response of the fingerpad interface and the prefilter shapes the frequency-response of the closed-loop system to match with the human detection-threshold function. The controller is subsequently used in a speech communication system that extracts spectral features from recorded speech signals and presents them as vibrational-motional waveforms to three digits on a receiver’s left hand. Performance from a consonantal contrast test suggests that participants are able to identify tactual cues necessary for discriminating consonants in the initial position of consonant-vowel-consonant (CVC) segments. The average sensitivity indices for contrasting voicing, place, and manner features are 3.5, 2.7, and 3.4, respectively. The results show that the consonantal features can be successfully transmitted by utilizing a broad range of the kinesthetic-cutaneous sensory system. The present study also demonstrates the validity of designing controllers that take into account not only the electromechanical properties of the hardware, but the sensory characteristics of the human user.
Url:
DOI: 10.1121/1.3124771
PubMed: 19507975
PubMed Central: 2736701
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<front><div type="abstract" xml:lang="en"><p>This paper presents the design and evaluation of a new controller for a multi-finger tactual display in speech communication. A two-degree-of-freedom controller consisting of a feedback controller and a prefilter and its application in a consonant contrasting experiment are presented. The feedback controller provides stable, fast, and robust response of the fingerpad interface and the prefilter shapes the frequency-response of the closed-loop system to match with the human detection-threshold function. The controller is subsequently used in a speech communication system that extracts spectral features from recorded speech signals and presents them as vibrational-motional waveforms to three digits on a receiver’s left hand. Performance from a consonantal contrast test suggests that participants are able to identify tactual cues necessary for discriminating consonants in the initial position of consonant-vowel-consonant (CVC) segments. The average sensitivity indices for contrasting voicing, place, and manner features are 3.5, 2.7, and 3.4, respectively. The results show that the consonantal features can be successfully transmitted by utilizing a broad range of the kinesthetic-cutaneous sensory system. The present study also demonstrates the validity of designing controllers that take into account not only the electromechanical properties of the hardware, but the sensory characteristics of the human user.</p>
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<pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">J Acoust Soc Am</journal-id>
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<article-categories><subj-group subj-group-type="heading"><subject>Psychological Acoustics [66]</subject>
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<aff>Haptic Interface Research Laboratory, Purdue University, 465 Northwestern Avenue, West Lafayette, Indiana 47907-2035</aff>
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<contrib-group><contrib contrib-type="author"><name><surname>Meckl</surname>
<given-names>Peter H.</given-names>
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<aff>Ruth and Joel Spira Laboratory for Electromechanical Systems, 585 Purdue Mall, West Lafayette, Indiana 47907-2088</aff>
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<contrib-group><contrib contrib-type="author"><name><surname>Reed</surname>
<given-names>Charlotte M.</given-names>
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<aff>Research Laboratory of Electronics, Massachusetts Institute of Technology, Room 36-751, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139</aff>
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<contrib-group><contrib contrib-type="author"><name><surname>Tan</surname>
<given-names>Hong Z.</given-names>
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<aff>Haptic Interface Research Laboratory, Purdue University, 465 Northwestern Avenue, West Lafayette, Indiana 47907-2035</aff>
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<author-notes><fn id="n2"><label>b)</label>
<p>Author to whom correspondence should be addressed. Electronic mail: <email>israr@rice.edu</email>
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<pub-date pub-type="ppub"><month>6</month>
<year>2009</year>
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<volume>125</volume>
<issue>6</issue>
<fpage>3925</fpage>
<lpage>3935</lpage>
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<month>8</month>
<year>2008</year>
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<date date-type="rev-recd"><day>24</day>
<month>3</month>
<year>2009</year>
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<date date-type="accepted"><day>29</day>
<month>3</month>
<year>2009</year>
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<permissions><copyright-statement>Copyright © 2009 Acoustical Society of America</copyright-statement>
<copyright-year>2009</copyright-year>
<copyright-holder>Acoustical Society of America</copyright-holder>
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<abstract><p>This paper presents the design and evaluation of a new controller for a multi-finger tactual display in speech communication. A two-degree-of-freedom controller consisting of a feedback controller and a prefilter and its application in a consonant contrasting experiment are presented. The feedback controller provides stable, fast, and robust response of the fingerpad interface and the prefilter shapes the frequency-response of the closed-loop system to match with the human detection-threshold function. The controller is subsequently used in a speech communication system that extracts spectral features from recorded speech signals and presents them as vibrational-motional waveforms to three digits on a receiver’s left hand. Performance from a consonantal contrast test suggests that participants are able to identify tactual cues necessary for discriminating consonants in the initial position of consonant-vowel-consonant (CVC) segments. The average sensitivity indices for contrasting voicing, place, and manner features are 3.5, 2.7, and 3.4, respectively. The results show that the consonantal features can be successfully transmitted by utilizing a broad range of the kinesthetic-cutaneous sensory system. The present study also demonstrates the validity of designing controllers that take into account not only the electromechanical properties of the hardware, but the sensory characteristics of the human user.</p>
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<notes><fn-group><fn id="tr1"><label>1</label>
<p>Part of this work concerning the controller design was presented at the 2004 ASME International Mechanical Engineering Congress and Exposition, Anaheim, CA, Nov. 13-19, 2004.</p>
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