2. Virtual and Real-World Wayfinding for Visually Impaired People
Introduction Introduction
Real-world Wayfindng How do you describe a sunset to someone who is blind?
Virtual Wayfinding
Graphic Representation
Sensory Substitution
Passive Technologies
Acoustic Technologes
Haptic Technologies
Proposal
Links
References
3. Virtual and Real-World Wayfinding for Visually Impaired People
Introduction Introduction
Real-world Wayfindng How do you describe a sunset to someone who is blind?
Virtual Wayfinding
How can we share information about the natural world?
Graphic Representation
Sensory Substitution
Passive Technologies
Acoustic Technologes
Haptic Technologies
Proposal
Links
References
4. Virtual and Real-World Wayfinding for Visually Impaired People
Introduction Introduction
Real-world Wayfindng How do you describe a sunset to someone who is blind? Yes I am BLIND...But I SEE the world thru the sound of Music by SwEeT_AnGeL_i.
Yes I am blind
Virtual Wayfinding Cant u see
I am blind
How can we share information about the natural world? To the discrimination made on caste and creed
Graphic Representation
Yes I am blind
Sensory Substitution Cant you see
What unique abilities to blind people possess? I am blind
To the emotion of Lust and Greed.
Passive Technologies
Yes I am blind
Acoustic Technologes Cant you feel
I am blind
To the pain that comes from jealousy
Haptic Technologies
Yes I am blind
Proposal Cant you see
I am blind
To the reasons that pave way for wars due to Fallacy.
Links
I do see the world, through the sound of Music
References Which is made of Love, Joy and Harmony
I do see the world, through the eyes of my Soul
Which believes in Humanity as its ultimate Goal
I do see the world, through the words of Compassion
Which helps me nurture my spiritual role
I do see the world, with the touch of passion
That comes from the people who have heart of gold.
Sometimes I just wonder,
Why cant the world be
…BLIND like me?????
Be blind to hatred, caste, lust and greed
And see the world as I see.....@from a blind girl's point of view, written by Sweet Angel. (Flickr.com)
5. Virtual and Real-World Wayfinding for Visually Impaired People
Introduction Introduction
Real-world Wayfindng How do you describe a sunset to someone who is blind?
Virtual Wayfinding
How can we share information about the natural world?
Graphic Representation
Sensory Substitution
What unique abilities to blind people possess?
Passive Technologies
Acoustic Technologes How have blind people overcome their challenges?
Haptic Technologies
Proposal
Links
References
6. Virtual and Real-World Wayfinding for Visually Impaired People
Introduction Introduction
Real-world Wayfindng How do you describe a sunset to someone who is blind?
Virtual Wayfinding
How can we share information about the natural world?
Graphic Representation
Sensory Substitution
What unique abilities to blind people possess?
Passive Technologies
Acoustic Technologes How have blind people overcome their challenges?
Haptic Technologies
What has led blind people to experience great successes?
Proposal
Links
References
7. Virtual and Real-World Wayfinding for Visually Impaired People
Introduction Introduction
Real-world Wayfindng How do you describe a sunset to someone who is blind?
Virtual Wayfinding
How can we share information about the natural world?
Graphic Representation
Sensory Substitution
What unique abilities to blind people possess?
Passive Technologies
Acoustic Technologes How have blind people overcome their challenges?
Haptic Technologies
What has led blind people to experience great successes?
Proposal
Links How can our biases harm or inhibit blind people?
References
8. Virtual and Real-World Wayfinding for Visually Impaired People
Introduction Introduction
Real-world Wayfindng How do you describe a sunset to someone who is blind?
Virtual Wayfinding
How can we share information about the natural world?
Graphic Representation
Sensory Substitution
What unique abilities to blind people possess?
Passive Technologies
Acoustic Technologes How have blind people overcome their challenges?
Haptic Technologies
What has led blind people to experience great successes?
Proposal
Links How can our biases harm or inhibit blind people?
References
How can we create tools that support their creativity?
9. Virtual and Real-World Wayfinding for Visually Impaired People
Introduction Introduction
Real-world Wayfindng How do you describe a sunset to someone who is blind?
Virtual Wayfinding
How can we share information about the natural world?
Graphic Representation
Sensory Substitution
What unique abilities to blind people possess?
Passive Technologies
Acoustic Technologes How have blind people overcome their challenges?
Haptic Technologies
What has led blind people to experience great successes?
Proposal
Links How can our biases harm or inhibit blind people?
References
How can we create tools that support their creativity?
How can we help blind people be independently mobile?
10. Virtual and Real-World Wayfinding for Visually Impaired People
Introduction Introduction
Real-world Wayfindng How do you describe a sunset to someone who is blind?
Virtual Wayfinding
How can we share information about the natural world?
Graphic Representation
Sensory Substitution
What unique abilities to blind people possess?
Passive Technologies
Acoustic Technologes How have blind people overcome their challenges?
Haptic Technologies
What has led blind people to experience great successes?
Proposal
Links How can our biases harm or inhibit blind people?
References
How can we create tools that support their creativity?
How can we help blind people be independently mobile?
How can we address varied levels of blindness?
11. Virtual and Real-World Wayfinding for Visually Impaired People
Real-world Wayfinding - Difficulties
Introduction
Real-world Wayfindng maps can change for one particular area
‘lack much of the information needed for planning
depending on the:
Virtual Wayfinding detours around obstacles and hazards, and have
little information about distant landmarks, heading
Graphic Representation
(1) time of day (i.e. day/night)
and self-velocity’
Sensory Substitution
[Loomis JM, Golledge RG, Klatzky RL, 2001]
Passive Technologies
(2) season (e.g. summer vs. winter)
Acoustic Technologes we need to determine - ‘what spatial information
(3) direction of travel
should be given to visually impaired pedestrians, in
Haptic Technologies
(travelling the same route forward or back).
what form and at which particular locations’
Proposal
[Kitchen RM, Jacobson D, 1997]
Links
[Jonsson E, 2002]
References context-aware computing is only helpful if it
‘adapts according to its location of use, the
collection of nearby people and objects, as well as
changes to those objects over time’
[Schilit B, Theimer M, 1994]
12. Virtual and Real-World Wayfinding for Visually Impaired People
Real-world Wayfinding - Findings
Introduction
Real-world Wayfindng Different forms of visual impairment might also
Virtual Wayfinding impact on cognitive map development
[Bradley, Nicholas A. and Dunlop, Mark D., 2005]
Graphic Representation
Sensory Substitution
Passive Technologies
Acoustic Technologes
Haptic Technologies
Proposal
Links
References
[Bradley, Nicholas A. and Dunlop, Mark D., 2005]
13. Virtual and Real-World Wayfinding for Visually Impaired People
Real-world Wayfinding - Findings
Introduction
Real-world Wayfindng Different forms of visual impairment might also
Virtual Wayfinding impact on cognitive map development
[Bradley, Nicholas A. and Dunlop, Mark D., 2005]
Graphic Representation
Sensory Substitution
Important aspects of a user’s context are ‘where
Passive Technologies
you are, who you are with, and what resources are
Acoustic Technologes nearby’.
[Schilit B, Adams N, Want R, 1994]
Haptic Technologies
Proposal
Links
References
14. Virtual and Real-World Wayfinding for Visually Impaired People
Real-world Wayfinding - Findings
Introduction
Real-world Wayfindng Different forms of visual impairment might also
Virtual Wayfinding impact on cognitive map development
[Bradley, Nicholas A. and Dunlop, Mark D., 2005]
Graphic Representation
Sensory Substitution
Important aspects of a user’s context are ‘where
Passive Technologies
you are, who you are with, and what resources are
Acoustic Technologes nearby’.
[Schilit B, Adams N, Want R, 1994]
Haptic Technologies
Proposal
Directions consisting of a reduced amount of
Links
textual-structural and textual area/street
References information, and incorporated sensory, motion, and
social contact information are more optimal for
helping visually impaired people navigate.
[Bradley, Nicholas A. and Dunlop, Mark D., 2005]
15. Virtual and Real-World Wayfinding for Visually Impaired People
Virtual Wayfinding - Difficulties
Introduction
Real-world Wayfindng
Many sites are not meeting accessibility standards and can
Virtual Wayfinding not be quickly or easily navigated non-visually
[Asakawa, 2005]
Graphic Representation
Sensory Substitution
Passive Technologies
Acoustic Technologes
Haptic Technologies
Proposal
Links
References
[Asakawa, C., Fukuda, K., Maeda, J., 2004] >>>>>>>>>>>>
16. Virtual and Real-World Wayfinding for Visually Impaired People
Virtual Wayfinding - Difficulties
Introduction
Real-world Wayfindng
Many sites are not meeting accessibility standards and can
Virtual Wayfinding not be quickly or easily navigated non-visually
[Asakawa, 2005]
Graphic Representation
Sensory Substitution
Even though the Web is an extremely useful tool for blind
Passive Technologies
users to obtain information, it has been becoming much
Acoustic Technologes visual and thus inaccessible to blind users.
[Asakawa, 2005]
Haptic Technologies
Proposal
Links
References
[Asakawa, C., Fukuda, K., Maeda, J., 2004] >>>>>>>>>>>>
17. Virtual and Real-World Wayfinding for Visually Impaired People
Virtual Wayfinding - Difficulties
Introduction
Real-world Wayfindng
Many sites are not meeting accessibility standards and can
Virtual Wayfinding not be quickly or easily navigated non-visually
[Asakawa, 2005]
Graphic Representation
Sensory Substitution
Even though the Web is an extremely useful tool for blind
Passive Technologies
users to obtain information, it has been becoming much
Acoustic Technologes visual and thus inaccessible to blind users.
[Asakawa, 2005]
Haptic Technologies
Proposal
visual impairness: people with visual disabilities (currently
Links
relying on “screen readers” software to browse websites)
References still experience frustration in getting a communication
which is far from being effective through the aural channel.
[Bolchini, Davide, Colazzo, Sebastiano, Paolini, Paolo and
Vitali, Daniele, 2006]
[http://www.apple.com/accessibility/macosx/vision.html] >>
18. Virtual and Real-World Wayfinding for Visually Impaired People
Virtual Wayfinding - Solutions
Introduction
Real-world Wayfindng
The aDesigner is not an assistive technology program, but
Virtual Wayfinding rather it is a disability simulator, which was developed for
Web developers to help them ensure that their pages are
Graphic Representation
accessible and usable for people with vision disabilities
Sensory Substitution
[http://www.alphaworks.ibm.com/tech/adesigner]
Passive Technologies
Acoustic Technologes Strategies are being developed to improve aural
information architectures - acoustically scannable
Haptic Technologies
[Bolchini et al, 2006]
Proposal
Links
Two main languages lead the market in the field of voice
References applications:
VoiceXML
[http://www.w3.org/TR/voicexml20/]
SALT
[http://research.microsoft.com/en-us/projects/salt/
default.aspx].
19. Virtual and Real-World Wayfinding for Visually Impaired People
Graphic Information - Difficulties
Introduction
Real-world Wayfindng
U.S. Federal law requires that all government information
Virtual Wayfinding on the Web be available to users with disabilities, and
Graphic Representation other governments around the world have similar laws.
[www.section508.gov]
Sensory Substitution
Passive Technologies
The paradox is that government agencies are presenting
Acoustic Technologes more data on the Web through choropleth maps, but at
the same time, these government agencies are increasingly
Haptic Technologies
required to make that data accessible to people with
Proposal
disabilities.
Links [Zhao, H , Plaisant, C. and Shneiderman, B. Lazar, J., 2008]
References
20. Virtual and Real-World Wayfinding for Visually Impaired People
Graphic Information - Solutions
Introduction
Real-world Wayfindng
Sonification - Different acoustic variables such as pitch,
Virtual Wayfinding volume, timbre and position can be used to represent
Graphic Representation quantitative, qualitative and categorical aspects of the
information [Franklin and Roberts, 2003]
Sensory Substitution
Passive Technologies Could be used to assist visual impaired people in exploring
georeferenced data like coordinated maps and tables
Acoustic Technologes
[Zhao, H et al, 2008]
Haptic Technologies
Proposal toolkits were developed to help researchers attempt
different data-to-sound attribute mappings
Links
[Pauletto and Hunt or Walker and Cothran, 2003]
References
Research has shown that musical sounds enhance numeric
data comprehension [Ramloll et al., 2001]
Humans can interpret a quick sonified overview of
[http://www.icad.org/]
simple data graphs [Flowers et al., 1997; Brown et al.,
21. Virtual and Real-World Wayfinding for Visually Impaired People
Sensory Substitution
Introduction
Real-world Wayfindng
Seeing through Touch
Virtual Wayfinding
<<<
Graphic Representation
quot; The person in the foreground is Deaf and blind. She
Sensory Substitution
is learning how to use a computer. Her interpreter is
Passive Technologies
translating the instructor's comments to the student. The
Acoustic Technologes method used by many who are Deaf-blind is called tactile
sign language.quot;
Haptic Technologies
-Cobalt123 Flickr.com
Proposal
Links
For more about tactile sign language:
References
[en.wikipedia.org/wiki/Tactile_signing]
[gupress.gallaudet.edu/excerpts/TSLintro3.html]
22. Virtual and Real-World Wayfinding for Visually Impaired People
Sensory Substitution
Introduction
Real-world Wayfindng
Seeing through Sound
Virtual Wayfinding
<< quot; A camera scans the visual field. The images are
Graphic Representation
converted into a soundscape by the computer. How the
Sensory Substitution
sounds might quot;lookquot;: a brightness represented by volume;
Passive Technologies
elevation is represented by pitch.quot;
Acoustic Technologes
quot; Meijer, a research scientist in the Netherlands, has
Haptic Technologies
developed a technology called the vOICe, which allows you
Proposal
to represent visual information - to quot;seequot; - with sounds.quot;
Links
References - The New York Times
[http://www.nytimes.com/2005/12/11/magazine/11ideas_
section3-14.html?ex=1291957200&en=3c72cf9fa46bbb06&e
i=5090&partner=rssuserland&emc=rss]
Merabet L. , Battelli, L., Obretenova, S., Maguire , P.,
Meijer S. and Pascual-Leone, A. ,(2009)
23. Virtual and Real-World Wayfinding for Visually Impaired People
Passive Technologies - Braille
Introduction
Real-world Wayfindng <<< Braille on a Canadian Banknote
Virtual Wayfinding
Graphic Representation
Adding Braille to Banknotes or Currency could be helpful
Sensory Substitution
Passive Technologies Variations in the size of American currency could also be
Acoustic Technologes helpful to blind people
Haptic Technologies
Proposal
Links
References
24. Virtual and Real-World Wayfinding for Visually Impaired People
Passive Technologies - Cane
Introduction
Real-world Wayfindng <<< Foldable Walking Stick
Virtual Wayfinding
Blind people use walking sticks the search for obstacles
Graphic Representation
that they may encounter on their walking path
Sensory Substitution
Passive Technologies Some canes can be easily folded away
Acoustic Technologes
Haptic Technologies
Proposal
Links
References
25. Virtual and Real-World Wayfinding for Visually Impaired People
Passive Technologies - Textured Paths
Introduction
Real-world Wayfindng <<< Textured Paths
Virtual Wayfinding [Blind in Japan by ben.thomas at Flickr.com]
Graphic Representation
These detectable directional systems are surface tiles
Sensory Substitution
which contain a series of raised parallel ridges or plateaus
Passive Technologies which indicate direction and orientation. They are used
Acoustic Technologes extensively in Australia and Japan to facilitate blind people
in navigating transits systems and public areas
Haptic Technologies
Proposal
Links
References
26. Virtual and Real-World Wayfinding for Visually Impaired People
Passive Technologies - Time & Orientation
Introduction
Real-world Wayfindng (LEFT) Compass that tactilely represent
Virtual Wayfinding directions - helpful for orientation
Graphic Representation
(RIGHT) Watch with flip-open face
Sensory Substitution
makes it possible to tactilely read time
Passive Technologies
Acoustic Technologes
Haptic Technologies
Proposal
Links
References
27. Virtual and Real-World Wayfinding for Visually Impaired People
Acoustic - Screen Readers
Introduction
Real-world Wayfindng <<< JAWS Screenreader User
Virtual Wayfinding
The most commonly used screen readers:
Graphic Representation
Sensory Substitution
JAWS Screen Reader - http://www.freedomscientific.
Passive Technologies com/products/fs/jaws-product-page.asp
Acoustic Technologes
Windows Eyes Screen Reader - http://www.gwmicro.
Haptic Technologies
com/Window-Eyes/
Proposal
Links
References
28. Virtual and Real-World Wayfinding for Visually Impaired People
Acoustic - Navigation
Introduction
Real-world Wayfindng <<< Sonic Pathfinder
Virtual Wayfinding
The Sonic Pathfinder is a head-mounted pulse-echo sonar
Graphic Representation
system controlled by a microcomputer. The five ultra-sonic
Sensory Substitution
transducers which are mounted on the head-band comprise
Passive Technologies three receivers, one pointing left, one right and one straight
Acoustic Technologes ahead, and two transmitters. The two transmitters are
angled so as to irradiate the user's pathway with ultra-
Haptic Technologies
sonic energy. Echoes from objects lying within this pathway
Proposal
are received by the three receiving transducers and this
Links information is processed by the on-board computer. The
References output of the device, the display, is fed to one or other of
the two ear pieces depending on whether the object is on
the left or the right of the user or to both ear pieces if the
object lies directly in the travel path.
[http://www.sonicpathfinder.org/]
29. Virtual and Real-World Wayfinding for Visually Impaired People
Acoustic - GPS Trekker
Introduction
Real-world Wayfindng GPS for people who are visually impaired
Virtual Wayfinding [http://www.humanware.com]
Graphic Representation
<<< Trekkor & Trekkor Breeze
Sensory Substitution
Passive Technologies Trekker Breeze lets you:
Acoustic Technologes • know where you are and where you are going
• what is around in your location (public services and
Haptic Technologies
businesses)
Proposal
• Easily retrace your steps if you get lost. Simply push a
Links button.
References • Record the routes when you learn them with sighted
people so that you can use them later without assistance.
• Record landmarks along your route, for example to get
to your favorite restaurant or a friend’s house.
• Get the step-by-step instructions from start to end.
30. Virtual and Real-World Wayfinding for Visually Impaired People
Haptic - Refreshable Braille Display
Introduction
Real-world Wayfindng <<< Refreshable Braille displays can be used in conjuction
Virtual Wayfinding with screen readers like WIndow-Eyes, JAWS or Apple's
built-in screen reader to read text from the internet
Graphic Representation
Sensory Substitution
[http://en.wikipedia.org/wiki/Screen_reader]
Passive Technologies
Acoustic Technologes
Haptic Technologies
Proposal
Links
References
31. Virtual and Real-World Wayfinding for Visually Impaired People
Haptic - Navigation
Introduction
Real-world Wayfindng <<< The Miniguide uses ultrasonic echo-location to detect
Virtual Wayfinding objects. The aid vibrates to indicate the distance to objects
- the faster the vibration rate the nearer the object.
Graphic Representation
Sensory Substitution
There is also an earphone socket which can be used to
Passive Technologies provide sound feedback.
Acoustic Technologes
The aid has various distance modes for senses ranges of :
Haptic Technologies
Proposal
• 4 meter
Links • 2 meter
References • 1 meter
• half meter
• 8 meter
[http://www.gdp-research.com.au]
32. Virtual and Real-World Wayfinding for Visually Impaired People
Haptic - Public Transit
Introduction
Real-world Wayfindng <<< Cross walk (BELOW) Transit system signage and ticket exchange in Japan
Virtual Wayfinding signal for the [from ben.thomas on Flickr.com]
blind. Vibrates
Graphic Representation
to let people
Sensory Substitution
know when it is
Passive Technologies safe to cross
Acoustic Technologes
[from Rachel
Haptic Technologies
Cotton on
Proposal
Flickr.com]
Links
References
33. Virtual and Real-World Wayfinding for Visually Impaired People
Sonifier - a portable hand-held device for sonification
Introduction
Real-world Wayfindng
• gives blind students access to info in graphs
Virtual Wayfinding Headphones Speaker USB Port
Stylus
• 8-10 inch screen with adjustable resolution
Graphic Representation
Toggle Button
Sensory Substitution
• audio from speaker and headphone jack Key
Passive Technologies
Acoustic Technologes • Displays XML formatted messages
Haptic Technologies
• Recieves datasets for bar, line, scatter plot
Proposal Graph Quadrants
and choropleth map graphs through USB
Links
References • Button to toggle between modes - one for
verbal descriptions and one for sonification
• Recessed touch surfaces - One larger surface
and two thinner ajacent surfaces - touch with Key
stylis to hear key ranges and associated sounds
34. Virtual and Real-World Wayfinding for Visually Impaired People
Links
Introduction
Real-world Wayfindng
Web content accessibility guidelines - http://www.w3.org/WAI/intro/wcag.php
Virtual Wayfinding
JAWS Screen Reader - http://www.freedomscientific.com/products/fs/jaws-product-page.asp
Graphic Representation
Sensory Substitution
Windows Eyes Screen Reader - http://www.gwmicro.com/Window-Eyes/
Passive Technologies
Acoustic Technologes Mac technologies for the Visually Impaired - http://www.apple.com/accessibility/macosx/vision.html
Haptic Technologies
Government Information Standards for People with Disabilities - www.section508.gov
Proposal
Links Disability Simulator (Windows Only) - http://www.alphaworks.ibm.com/tech/adesigner
References
Wayfinding Technologies - http://www.construction-innovation.info/index.php?id=836
Universal Low Vision Aids - http://www.ulva.com/
Access Watch: Blind users review accessibility of mainstream software - http://www.accesswatch.info/
35. Virtual and Real-World Wayfinding for Visually Impaired People
References
Introduction
Real-world Wayfindng
Asakawa, Chieko (2005) What's the Web Like If You Can't See It? W4A at WWW2005, 10th May 2005, Chiba, Japan
Virtual Wayfinding Copyright 2005 ACM
Graphic Representation
Bolchini, Davide, Colazzo, Sebastiano, Paolini, Paolo and Vitali, Daniele (2006) Designing Aural Information
Sensory Substitution
Architectures. SIGDOC'06, October 18–20, 2006, Myrtle Beach, South Carolina, USA.
Passive Technologies
Acoustic Technologes Bradley, Nicholas A. and Dunlop, Mark D. (2005) An Experimental Investigation into Wayfinding Directions for Visually
Impaired People. Published online: June 22, 2005 Springer-Verlag London
Haptic Technologies
Proposal
Bradyn JA (1985) A review of mobility aids and means of assessment. In: Warren DH, Strelow ER (eds) Electronic spatial
Links
sensing for the blind. Martinus Nijhoff, pp 13–27
References
Brown, L., Brewster, S. A., Ramloll, R., Burton, M., AND Riedel, B. 2003. Design guidelines
for audio presentation of graphs and tables. In Proceedings of the International Conference
on Auditory Display.
36. Virtual and Real-World Wayfinding for Visually Impaired People
References
Introduction
Real-world Wayfindng
Flowers, J. H., Buhman, D. C., and Turnage, K. D. 1997. Cross-modal equivalence of visual
Virtual Wayfinding and auditory scatterplots for exploring bivariate data samples. Human Factors 39, 3, 340–350.
Graphic Representation
Franklin, K. M. and Roberts, J. C. 2003. Pie chart sonification. In Proceedings of the Annual
Sensory Substitution
IEEE Symposium on Information Visualization. 4–9.
Passive Technologies
Acoustic Technologes Jonsson E (2002) Inner navigation: why we get lost and how we find our way. Scribner, New York, pp 27–126
Haptic Technologies
Kay L (1980) Air sonar with acoustical display of spatial information. In: Busnel RG, Fish JF (eds) Animal sonar system.
Proposal
Plenum, New York, pp 769–816
Links
References Kitchen RM, Jacobson D (1997) Techniques to collect and analyze the cognitive map knowledge of people with visual
impairments or blindness: Issues of validity. J Visual Impair Blind 360–376
Loomis JM, Golledge RG, Klatzky RL (2001) GPS-Based navigation system for the visually impaired. In: Barfield W,
Caudell T (eds) Fundamentals of wearable computers and augmented reality. Lawrence Erbaum Associates, Mahwah NJ,
pp 429–446
37. Virtual and Real-World Wayfinding for Visually Impaired People
References
Introduction
Real-world Wayfindng
Merabet L. , Battelli, L., Obretenova, S., Maguire , P., Meijer S. and Pascual-Leone, A. ,(2009) ``Functional Recruitment of
Virtual Wayfinding Visual Cortex for sound encoded object identification in the Blind,'' NeuroReport, Vol. 20, No. 2, pp. 132 - 138, January
2009 (doi: 10.1097/WNR.0b013e32832104dc).
Graphic Representation
Sensory Substitution
Schilit B, Adams N, Want R (1994) Context-aware computing applications. In: First international workshop on mobile
Passive Technologies
computing systems and applications pp 85–90
Acoustic Technologes
Schilit B, Theimer M (1994) Disseminating active map information to mobile hosts. IEEE Network 8(5):22–32
Haptic Technologies
Proposal
Takagi, H., Asakawa, C., Fukuda, K., Maeda, J., (2004) Accessibility Designer: Visualizing Usability for the Blind, In
Links
Proceedings of the 6th international ACM SIGACCESS
References conference on Assistive Technologies (ASSETS 2004), pp. 177-184
Zhao, H , Plaisant, C. and Shneiderman, B. Lazar, J. (2008) Data Sonification for Users with Visual Impairment: A Case
Study with Georeferenced Data. (2008) ACM Transactions on Computer-Human Interaction (TOCHI)Volume 15 , Issue 1
(May 2008) Article No. 4