RRIMT/EC/3rd Yr/6th Sem/Seminar 1

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AUDIO SPOT LIGHT

Abhijeet Aditya1236131801E.C. 3rd Year

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INTRODUCTION THEORY COMPONENTS & SPECIFICATIONS TECHNOLOGY OVERVIEW FEATURES & APPLICATIONS ADVANTAGES & DISADVANTAGES CONCLUSION

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CONTENTS

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INTRODUCTIONWHAT IS AUDIO SPOTLIGHTING?

It creates focused beams of sound similar to light beams coming out of a flashlight.

It uses ultrasonic energy to create extremely narrow beams of sound that behave like beams of light

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Into the depth of audio spot lighting

Loudspeakers are direct radiating—that they

fundamentally a piston like device designed to directly pump air molecules into motion to create audible sound we hear

The beam angle of audible sound is very wide, just about 360 degrees

In order to focus sound into a narrow beam, you need to maintain a low beam angle that is dictated by wavelength18-02-2015

THEORY

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The original low frequency sound waves such as human speech or music are applied into an audio spotlight emitter deviceThis low frequency signal is frequency modulated with ultrasonic frequenciesSince ultrasonic frequency is used the wavelength of the combined signal will be in the order of few millimetersSince the wavelength is smaller the beam angle will be around 3 degree, as a result the sound beam will be narrow one with a small dispersion

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CONVENTIONAL AND AUDIO SPOT LIGHT PHENOMENON

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Components of audio spot

light

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Audio Spotlight consists of following major

components:

Sound beam processor/amplifier Frequency oscillator Modulator Microcontroller Power supply Audio Spotlight transducer18-02-2015

COMPONENT & SPECIFICATION

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SOUND BEAM PROCESSOR

Worldwide power input standard

Standard chassis 171mm(w) x57mm(h) x 280mm(d) option mount rack kit

Audio input: balanced custom configurations available

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AUDIO SPOTLIGHT TRANSDUCER 445 mm diameter, 12.7 mm

thick, 1.82kg Wall, overhead or flush

mounting Audio input :100dB max Usable range :20m Audibility to 200m Compatible with loudspeaker

mounting accessories due to continue development

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The Audio Spotlight & Hyper Sonic Sound

uses ultrasonic energy to create extremely narrow beam of sound that behave like beam of light

These ultrasonic sound have very small wavelength

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TECHNOLOGY OVERVIEW

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DIRECT AUDIO & PROJECTED AUDIO

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Physically small speakers

No need for woofers, voice coils

Power efficient Directionality

Resultant audio retains directionality of ultrasonic sound source

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Features

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APPLICATION 1Audio Spotlight

speakers allow visitor to enjoy music while other read nearby peace & quiet

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APPLICATION 2Using this

technology two person can hear different sound while standing close to each other

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APPLICATION 3

The US Navy using this technology on deck as a substitute to the radio operator's headphones

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Can focus sound only at place you want

Ultrasonic emitter devices are thin and flat

The focused or directed sound travels much faster in a straight line than conventional loudspeakers

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

There is no lag in reproducing the sound

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ADVANTAGES

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Line of sight should be clear Directivity directly depends on the length of

the ultrasonic column

Long distance transmission is not possible

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DISADVANTAGES

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Audio spotlighting is really going to make a revolution in

sound transmission and the user can decide the path in which audio signal should propagate

Due to the unidirectional propagation it finds application in large number of fields.

Audio 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.”

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CONCLUSION

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THANK YOU!For Your Attention

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Queries???

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