Popularity of mobiles devices increasing day by day due to the advantage like portability, mobility and flexibility but the limited size gives very less interactive surface area. We cannot just make the device large without losing benefit of small size. So the Microsoft company has developed Skinput , a technology that appropriates the human body for acoustic transmission, allowing the skin to be used as an input surface. Human body produce different vibration when we tap on our body parts.

1. HUMAN SKIN AS TOUCH
SCREEN
Presented by
Km.Kazal
14143011
ECE- 8th
sem

2. CONTENTS
-Abstract
-Introduction
-What is skinput
-Principle of skinput
-How it works
-Advantages
-Disadvantage
-Applications
-Conclusion

3. Abstract
-The Microsoft company has developed Skin
put,
a technology that appropriates the human
body for acoustic transmission, allowing the
skin to be used as an input surface. Human
body produce different vibration when we tap
on our body parts. With the help of this unique
property of human body we can use different
locations as different functions of small devices
like mobile phones or music players.

4. Introduction
-Skin put allows the user to simply tap their skin in order to
control audio devices, play games, make phone calls.
-It uses the sensors to determine where the user taps on
their skin.

5. What is Skinput
-Giving input through skin.
-Was developed by Chris Harrison (Mellon Univ.)
-Skinput turns the body into a touch screen surface.
-Skin put, the system is a combination of two technologies:
the ability to detect the ultra low frequency sound and the
‘pico’ projectors.
-Pico projector applies the use of projector in a hand held
device.
-An acoustic detector detects the ultra low frequency.

6. Principle of Skinput
-It listens to vibrations in your body.
-Skinput also responds to the various hand gestures.
-The arm is an instrument.

8. Pico Projector
-It is also known as pocket projector or mobile projector.
-The system comprises three main parts:
The Laser light source
The Combiner optics
The Scanning mirror

9. Bio-Acoustics
• Study of sound waves inside living body.
• When a finger taps the skin, several distinct forms of
acoustic energy are produced.
Longitudinal Waves
Transverse Waves

10. Longitudinal Waves:
-These waves travel through the rigid tissues of
the arm, exciting the waves, which can respond
to the mechanical vibrations by tapping on a
rigid body.
Transverse Waves:
-Tapping on soft regions of the arm creates
higher amplitude transverse waves.

12. Bio-Acoustics: Sensing
• These signals need to be sensed and worked upon.
• This is done by wearing the wave sensor arm band.

14. Advantages
-No need to interact with the gadget directly.
-No worry about keypad.
-while walking and jogging, we can listen to music.
-Easy to work: skinput technology is easy to understand
and easy to use.
-Easy to access when your phone is not available.
-Large buttons to reduce the risk of pressing the wrong
buttons.

15. Disadvantage
- The arm band is currently bulky.
- If the user has more then a 30% body mass index,
skinput reduced 60% accuracy.
-The easy accessibility will cause people to be more socially
distracted.
-This technology only works on direct skin exposure.we can
not use full sleeves shirt when we are using this technology.
-Currently there are only five buttons with accuracy more
then 95%.A phone uses at least 10 buttons to dial a phone
number or send a text message. So in such cases it will
create problem.

16. Applications
-Mobile
-Gaming
-I-pads

18. CICRET band

19. Conclusion
-I have presented the approach to appropriating the human
body as an input interface.
-I described a wearable bio-acoustic array used to detect
and localize finger tap on the hand and the forearm.
-This system performs well even when the body is in
motion.

20. THANK YOU
Presented by:-
Km.kazal
14143011
EECE-8th
sem