VISVESVARAYA TECHNOLOGICAL UNIVERSITY, BELAGAVI-590018, KARNATAKA

Department of Electronics & Communication Engineering2014-2015

A Seminar on

“ VOICE CONVERSION FOR SILENT SOUND TECHNOLOGY”

Under the Guidance of : Prof.N K Honnagowdar M.E

Presented By: Lohit B.Dalal2HN11EC020

CONTENTS1. INTRODUCTION

2. NEED FOR SILENT SOUND

3. METHODS

4. ADVANTAGES

5. DISADVANTAGES

6. APPLICATIONS

7. FUTURE PROSPECT

8. CONCLUSION

9. REFERENCES

INTRODUCTION Amazing solution for those who had lost their voice but wish to

speak over phone.

It is a technology that helps you to transmit information without using your vocal cords.

Detects every lip movement and Internally converts the electrical pulses into sounds signals and sends them neglecting all other surrounding noise.

Hence person on other end of phone receives the information in audio.

Developed at the Karlsruhe Institute of Technology, Germany

Expected in the next 5 - 10 years. Once launched, will have a drastic effect and with no doubt, will be widely used.

NEED FOR SILENT SOUND An end to embarrassed situations such as:

Whenever we are talking on a cell phone in a crowd,then actually we are “not talking, because of lots of disturbance and noise around us.

In the case of an urgent call in a meeting, apologetically rushing out of the room in order to answer or call the person back.

METHODS

Two Methods for using Silent Sound Technology 1.Electromyography

2.Image Processing

ELECTROMYOGRAPHY (EMG)

Technique for evaluating and recording the electrical activity produced by skeletal muscles.

Performed using an instrument called an “Electromyograph”, to produce a record called an “Electromyogram”.

Electromyograph detects the electrical potential generated by muscle cells when these cells are electrically or neurologically activated.

Monitored signals are converted into electrical signals that can then be turned into speech.

EMG - PROCEDURE There are two types of EMG

1.surface EMG Four sensor are used they are vibration,

pressure, motion and electromagnetic sensor.

2.Intramuscular EMG A Needle electrode or a needle

containing two fine - wire electrodes is inserted through the skin into the muscle tissue.

The insertional activity provides valuable information about the state of the muscle and its innervating nerve.

ELECTROMYOGRAPHY SIGNAL GENERATION

Basic mechanism of Electromyography where the muscle activity is analyzed by the Electromyograph to generate an Electromyogram

IMAGE PROCESSING(ULTRASOUND SSI)

Another way to obtain direct information on the vocal tract configuration is via imaging techniques.

Ultrasound imagery is a non-invasive and clinically safe procedure which makes possible the real-time visualization

An ultrasound transducer, placed beneath the chin, can provide a partial view of the tongue surface.

Fig 1.Silent Sound Interface (SSI) using Image Processing

CONTD…

Ultrasound probe

Camera

Speech

Silent/ laryngectomized speaker

Silent Vocoder

Lip Reader

ADVANTAGES

Helping people who have lost their voice due to illness or accident.

We can make silent calls even if we are standing in crowded place.

Very useful for sharing confidential information like secret PIN number on phone at public place.

DISADVANTAGES

It will be like always talking to robot.

This technology will be very costly for a common man.

APPLICATIONS

Silent Sound Techniques is applied in Military for communicating secret/confidential matters to others.

This technology can be best utilized by astronauts & dumb peoples.

FUTURE PROSPECT Without having electrodes & sensors hanging all

around the face, these electrodes & sensors will incorporated in to cell phones.

Features like lip reading based on image processing & recognition these are incorporated in to cell phones rather than using computers(Ultrasound SSI).

CONCLUSION

Silent Sound Technology, one of the recent trends in the field of information technology implements “Talking Without Talking”.

It will be one of the innovation and useful technology and in mere future this technology will be use in our day to day life.

REFERENCES

Honey Brijwani et al Int. Journal of Engineering Research and Applications ISSN : 2248-9622, Vol. 4, Issue 4( Version 9), April 2014

International Journal of Engineering Trends and Technology (IJETT) – Volume 9 Number14 Mar 2014

Shehjar Safayas , Kameshwar Sharma , Silent Sound Technology- An End to Noisy Communication, Speech Communication Vol. 1, Issue 9,November 2013

Michael Wand & Tanja Schultz ,Voice conversion for silent sound technology,(ICASSP) KIT Germany 2011

THANK YOU !!