A seminar on

AUDIO SPOTLIGHTING

Presented by Lokendra Pankaj(09EMHEC032)

CONTENTS

1. INTRODUCTION

2. BLOCK DIAGRAM

3. WORKING

4. TYPES OF MODES

5. ADVANTAGES

6. APPLICATIONS

7. CONCLUSION

Audio Spotlighting was invented by Dr. F.

Joseph Pompei.

Production of focused beams of sound.

Uses ultrasonic wave as carrier signal

Non-linearity of the air aid the device for its

working.

INTRODUCTION

BLOCK DIAGRAM OF AN AUDIO SPOTLIGHTING SYSTEM

WORKING

Audio Spotlighting Emitter

(21k to 28k Hz)

(Speech or music)

DISPERSION OF SOUND BEAM

Directivity

CONVENTIONAL SPEAKERS AUDIO SPOTLIGHTING

COMPARISON BETWEEN CONVENTIONAL

SPEAKERS & AUDIO SPOTLIGHTING

MODES OF LISTENING Direct Mode Projected Mode

ADVANTAGES1.Can focus sound only at the place you want.

2.Ultrasonic emitter devices are thin and flat and do not require a mounting cabinet.

3.Focused sound travels much faster in a straight line than conventional loudspeakers.

4.Dispersion can be controlled - very narrow or wider to cover more listening area.

APPLICATIONS1. Automobiles:2. Retail sales:

3. Public announcement:

4. Emergency rescue:5. Entertainment system:

Cont…

7. Museums:

8. Military applications:9. Audio/Video conferring:10. Sound bullets:11. Library:

FUTURE OF AUDIO SPOTLIGHTING

Audio spotlighting system holds the promise of replacing conventional speakers.

It allows the user to control the direction of propagation of sound.

Audio spotlighting really “put sound where you want”.

CONCLUSIONAudio spotlighting system is going to shape the

future of sound and will serve our ears with magical experience.

So we can conclude- Audio Spotlighting really “put sound where you want it” and will be

“A REAL BOON TO THE FUTURE.”

THANK YOU