which is a latest technology, the skin is used as the medium.

1. Presented by:
B.Harish
112P1A0411
IV E.C.E.
C.B.I.T.
SKINPUT
TECHNOLOG
Y.

2. INTRODUCTION
 Screens are smaller, cameras are
more ubiquitous, touch screen is
everywhere.
 Mobility , flexibility , responsiveness
are getting more demands.
 Microsoft puts forword a new flesh-
control input technology called

3. 1ST public appearance was at Microsoft’s
TechFest.

4. What is “Skinput”?
 Skinput is technology that appropriates
the human body for acoustic transmission.
 Its allows the skin to be used as input
surface, allows to interact with body in eye
free manner.
 Was devloped by Chris Harrison,
Microsoft Research.

5. Mechanical phenomenon :
 As the skin taps on the skin; acoustic
energies are formed.
 Two forms of the waves are formed:
1. Transverse.
2. Longitudinal.

6.  Sensors are activated by the waves
moving underneath it.
 Transverse waves formed moves outward
from the point of contact
 Transverse waves formed at soft part of
the skin is of higher amplitude than the
bony part of skin.

8. Cont…
 Some energy is transmitted inward, toward
the skeleton.
 These are longitudinal waves; excites the
bone.
 This excitation vibrates soft tissues
surrounding the entire length of the bone,
resulting in new longitudinal waves that
propagate outward to the skin.
 The sensor is activated as these waves hits
underneath it.

10. Sensing :
 Instead of a single sensing element
with a flat response curve, an array
of highly tuned vibration sensors are
used.
 Bio –acoustic sensor, it is employed
with small, cantilevered piezo films.

11. About the sensor design…
It is relatively inexpensive.
 Can be manufactured in a very small form
factor, rendering it suitable for inclusion in
future mobile devices.

12. Requirements :
 An acoustic detector to detect
sound vibrations.
 It uses a microchip-sized pico
projector to display menu.
 It needs bluetooth connection.

13. Prototype armband :

14. The design :
 The prototype features has two arrays of five
sensing elements, incorporated into an
armband form.
 Each sensor array is sensible to particular set
of frequencies:
1. Upper – low frequencies – fleshier.
2. Lower – high frequencies – denser
bones.

15. Key functions :
 This program provides a live visuization of the
data from the ten sensors.
 Its segments inputs from the data stream into
independent instances.
 Classifies these input instances.
 The audio stream is segmented into
individual taps using an absolute
exponential average of all ten channels.

16. Analysis :

17. Advantages :
 The projected interface can appear much
larger than it ever could on a device’s
screen.
 Arm can be brought closer to face to see
the display near
 contrast can be adjusted by dimming the
light so that a better picture will be visible
if skin and the text are too similar in color
during daylight.

18. conclusion :
 The technology itself is intriguing , and have
more application other than always avaibility.
 Skinput is very intersting technology . But its fate
will ultimately depend on how committed
Microsoft is to making it a commercial reality and
how soon.