silent sound technology

Silent Sound Technology
Najeeb P [EPAKECS029]
Guide : Raseek C , Asst.Professor
Department of Computer Science and Engineering
Government Engineering College,Sreekrishnapuram
12th March 2014

Introduction
Why ..... ???
Methods
Design
Features
Restrictions
Silent Sound Technology Najeeb P [EPAKECS029] Department of Computer Science 2

• Silence is the best answer for all the situations... even your
mobile understands!
• A technolgy that transforms the information without using our
vocal chords.

Introduction
Why ..... ???
Methods
Design
Features
Restrictions

Need For Silent Sound Technology
1
1
http://www.go-gulf.com/crowd talking on mobile phones-300x225.jpg

Need For Silent Sound Technology
• For a better way of communication in noisy public place.
• Perfect solution for those who lost their voice.

Introduction
Why ..... ???
Methods
Design
Features
Restrictions

Two methods are used
• Electromyography(EMG)
• Image Processing

Electromyography(EMG)
2
2
http://www.telecomspace.com/les/cebit/device.jpg

• Even by saying words without producing sound weak electric
currents are sent from brain to speech muscles. This
phenomenon is called ELECTROMYOGRAPHS.
• A technique for evaluating and recording the electrical activity
produced by articulatory muscles.
• The transducers involved convert the pulses into electrical
signals.

3
3
Reference[1]

Working..
• The sensors(each with two ne-wired electrodes) are attached
to the dierent part of the face
• The electrical activity is recorded
• The sensors has to be placed at various locations to obtain an
accurate signal

Working...
• Vocoder (voice encoder) converts this electrical signals into
speech patterns.
• Compare them with pre recorded speech pattern of spoken
words
• When there is a match, that sound is transmitted on to the
other end of the line.

Sensors used
• Pressure sensors
• Vibration sensors
• Electromagnetic sensor
• Motion sensors

Image Processing
4
4
http://www.telecomspace.com/silent sound/image processing.png

Image Processing
• Converting digital data tape into a lm image with minimal
corrections and calibrations.
• In the silent sound technology the output of this image
processing is an audio record.

Introduction
Why ..... ???
Methods
Design
Features
Restrictions

Components
• Data acquisition
• Online recognition
• Sound playback or synthesis

EMA based silent speech interface
5
5
Reference [1]

Data Collection and Processing[1]
Stimuli and Procedure
• A xed number of sentences for basic greeting and
conversation were selected form a list of most frequently used
sentences among AAC users
• The electromagnetic articulograph AG500 was used to register
the 3-D movements of the tongue, lip, and jaw when a subject
was talking.
• The articulograph records the movement by establishing a
calibrated electromagnetic eld.

Data Collection and Processing[1]
Data Processing
• Head movements were subtracted from the tongue and lip
locations.
• A zero-phase low-pass lter was applied for removing signal
noise.
• All sequences were manually segmented and annotated with
sentences.

Introduction
Why ..... ???
Methods
Design
Features
Restrictions

Features
• Native speakers can silently utter a sentence in their language,
and the receivers can hear the translated sentence in their
language.
• It appears as if the native speaker produced speech in a foreign
language.

Features
• The translation technology works for languages like English,
French and German.
• Allow people to make silent calls without bothering others.

Introduction
Why ..... ???
Methods
Design
Features
Restrictions

Restrictions
• This device presently needs nine leads to be attached to our
face which is quite impractical to make it usable.
• Complicated to identify person and emotions.
• Technology is dicult to apply in some language like Chinese,
where dierent tones can hold many dierent meanings.

Introduction
Why ..... ???
Methods
Design
Features
Restrictions

Applications
• Helping people who have lost their voice due to illness or
accident.
• Telling a trusted friend your PIN number over the phone
without anyone eavesdropping assuming no lip-readers are
around.
• Silent Sound Techniques is applied in Military for
communicating secret/condential matters to others.
• Eective calls in crowded place.

Introduction
Why ..... ???
Methods
Design
Features
Restrictions

Conclusion
• Silent Sound Technology one of the recent trends in the eld of
information technology implements Talking without Talking.
• It will be one of the innovation and useful technology and in
coming future this technology will be use in our day to day life
• The online algorithm still has room for improvement.

REFERENCE
• [1] Ashok samal,Frank Rudzicz,Jordan R Green and Jun Wang,
Sentence recognition from articulatory movements for Silent
Speech Interfaces ,IEEE International Conference on
Acoustics, Speech, and Signal Processing (ICASSP), 2012 ,
Page(s): 4985 - 4988 .
• [2] Ashok samal,Jordan R Green, Jun Wang and Tom D.
Carrell, Vowel recognition from continuous articulatory
movements for speaker dependent application, Signal
Processing and Communication Systems (ICSPCS), 2010 ,
Page(s): 1-7.

• [3] Guangqi Cao, Meng M. Helen and Zhiyong Wu,A Unied
Framework for Multilingual Text-to-Speech Synthesis with
SSML Specication as Interface,IEEE Tsinghua Science and
Technology ,2009 , Page(s): 623 - 630 .

Thank You for the attention

silent sound technology

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