Skinput is an input technology that uses bio-acoustic sensing to localize finger taps on the skin. It works by using sensors in an armband to detect transverse and longitudinal sound waves produced from taps on the skin. These vibrations are detected and used to determine the tap location, allowing the skin to act as a touch interface. A pico-projector can display a virtual screen on the arm to provide visual feedback from the input. Research is ongoing to miniaturize the armband and expand the technology to control more devices just by tapping on the skin.

1. Skinput Technology
Presented by:-AKHILENDRA PRATAP
Roll No.- 1352110002
Branch:- CSE(3rd Year)
K I T P S MORADABAD

2. CONTENTS

3. INTRODUCTION
Skinput is an input technology that uses the bio-acoustic sensing to
localize finger taps on the skin.
The device use pico-projector for provide direct manipulation on the
body.
The technology was developed by Cris Herrison with Microsoft
Research team.
Skin put is technology that use the surface of skin as input device.
Our skin produce a natural and mechanical vibration when tapped at
different places.
These vibrations are helps to functioning.

4. WHAT IS SKINPUT?
 Skin put is an input technology.
 Giving input through skin.
 It listen to vibration in our
body.
 Skin put uses series of sensors
to track where a user taps on
his arm.
 Skin put turns the body into a
touch screen interface.
 The arm is an instrument.

5. HOW ITS WORKS?
 Its needs bluetooth
connection.
 A microchip-sized pico-
projector
 An acoustic detector to
detect sound vibrations.

6. WORKING
 When user tap on their skin(hand), the bio-acoustic &
sensor study the sound waves.
 When finger tap on skin several distinct form of acoustic
energy are produced.
 Transverse wave
 Longitudinal wave

7. Transverse wave(working cont……)
Transverse ware are vibrating
perpendicular to the direction of its
propagation.
When you tap your skin with your
finger you generate transverse wave
Tapping on soft regions of the arm
create higher amplitude transverse
wave than tapping on boney areas.

8. Longitudinal wave(working cont……)
Longitudinal wave is a compressive wave
who vibrate in the direction of
propagation.
Its cause the internal skeletal structure to
vibrate.
This wave travel through the soft tissues
of the arm.
The joint play the important role in
making locations acoustically distinct.
This makes joints behave as acoustic
filters.

9. Bio-acousting : Sensing(working cont……)
Bio-acoustic sensing sensed
the signal and worked upon.
This is done by wearing
armband.
Two sensor packages are
shown in figure.

10. Armband prototype (working count……)
 Two arrays of five sensing
element incorporated, into an
armband.
 Two sensor packages focus on
the arm input.
 One package was located near
the Radius other near the Ulna.
 Signals transmitted though
denser bones.

11. Bio-acoustic sensors are
connected to the mobile
bluetooth.
A system use a tiny projector to
display a screen on to your forearm or
hand.
Then the menu display by the pico-
projector on user hand
Working Cont…...

12. Projector Display image on
arm Finger tap on arm
Vibrations produced & passed
through bones onto skin
Then detected by the detector
in armband

13. ADVANTAGES
No need to interact your gadget directly.
Don’t have to worry about keypad.
Easy to access when your phone is not available.

14. DISADVANTAGE
With visible disabilities can not use this product.
Arm band is currently bulky.
The visibility of projection of the buttons on the skin
can be reduced if the user has tattoo in their arm.

15. APPLICATIONS
Mobile
Gaming
I-pods
Education System

16. Skinput in future
Research is going on to-
Make Armband smaller.
Adding more device with skinput.
A person walk toward their home, tap their palm to unlock
the door and then tap some virtual buttons on their arm to
turn on TV.

17. CONCLUSION
o Skinput allows the human body as input surface.
o This system perform very well even if the body in
motion.
o In the future your hand could be your i-phone & your
handset could be watch sized on your wrist.