A

SEMINAR PRESENTATION

ON

“HOLOSONIC AUDIO SPOTLIGHT”

SUBMITTED BY:

AYUSH GAUTAM11EJCEC038

JECRC 1

2

CONTENTS

Theory

Holosonic Spotlighting

Basic Principal

Technology overview

Working

Component

Advantages

Applications

Future of holosonic

Conclusion

THEORYA technology that creates focused beams of sound similar

to light beams coming out of a flashlight.

Ultrasonic energy to create extremely narrow beams of

sound that behave like beams of light.

Specific listeners can be targeted with sound without others

nearby hearing it.

3

HOLOSONIC SPOTLIGHTING

The Holosonic Spotlight & Hyper Sonic Sound Technology

(developed by American Technology Corporation), uses

ultrasonic energy to create extremely narrow beams of sound

that behave like beams of light.

Audio spotlighting exploits the property of non-linearity of

air.

Sound Spotlighting is to focus sound into a coherent and

highly directional beam.

4

Basic Principle: Low Beam Angle is required to focus the sound.

Smaller the wave length ,Lesser the Beam angle.

Another way to focus sound is to use loudspeaker with

larger Aperture size.dio spot lighting works by emitting harmless high frequency ultrasonic tones that human ear cannot hear.

5

TECHNOLOGY OVERVIEW

• Audio spot lighting works by emitting harmless high frequency ultrasonic tones that human ear cannot hear.

• Parametric array employs the non linearity of the air to create audible by products From inaudible ultrasonic sound , resulting in extremely directive and beamlike sound

WORKING:-

• The original low frequency sound wave such as human speech or music is applied into an audio spotlight emitter device.

• This low frequency signal is frequency modulated with ultrasonic frequencies range with wave length of few millimeters.

• Since the wavelength is smaller the beam angle will be around 3 degree, as a result the sound beam will be a narrow one with a small dispersion.

Fig: AUDIO SPOTLIGHTING EMITTER

WORKING…….

WORKING…….

• Due to the nonlinearity property of air new sounds are formed within the wave.

• The new frequencies (sounds) will be added into the sound wave by the air itself.

• The new sound signal generated will be corresponding to the original information signal with a frequency in the range of 20 Hz to 20 KHz .

• Since we cannot hear the ultrasonic sound, we only hear the new sounds that are formed by the nonlinear action of the air

COMPONENT OF HOLOSONIC SPOTLIGHTING SYSTEM

1. Power Supply.

2. Frequency oscillator.

3. Modulator.

4. Audio signal processor.

5. Microcontroller.

6. Ultrasonic amplifier.

7. Transducer.

10

11

POWER SUPPLY Works on DC voltage.

Ultrasonic amplifier requires 48V DC.

FREQUENCY OSCILLATOR

Generates ultrasonic frequency signals in the range

of (21,000 Hz to 28,000 Hz) which is required for

the modulation of information signals.

MODULATOR

Convert the source signal material into ultrasonic signal.

Error correction is needed to reduce distortion without

loss of efficiency.

AUDIO SIGNAL PROCESSOR

Equalization and distortion control are performed in order to produce

a good quality sound signal

ULTRASONIC

Amplifiers amplifies the frequency modulated wave in order to

match the impedance of the integrated transducers.

TRANSDUCER

It is 1.27 cm thick and 17” in diameter.

Capable of producing audibility up to 200 meters with better clarity of

sound.

Exploit the nonlinearity property of air.

12

Creates highly FOCUSED BEAM

of sound

Sharper directivity than

conventional loud speakers

Uses inherent non-linearity of air

for demodulation

13

COMPARISON WITH CONVENTIONAL LOUD SPEAKER

14

HOW TO USE HOLOSONIC SPOTLIGHT ?

There are two ways to use Audio Spotlight.

First it can direct sound at a specific target creating

a contained area of listening space which is called

“Direct Audio”.

Second it can bounce off of a second object

creating an audio image.

15

Ways To Use Holosonic Spotlight

ADVANTAGESCan focus sound only at the place you want.

The focused or directed sound travels much faster in a straight

line than conventional loudspeakers.

Dispersion can be controlled – very narrow or wider to cover

more listening area.

Can reduce or eliminate the feedback from microphones.

Highly cost effective as the maintenance required is less as

compared to conventional loud speakers.

16

APPLICATIONS

AUTOMOBILES

Presently Mercedes – Benz buses are fitted with audio

spotlighting speakers so that individual travelers can enjoy the

music of there on interest.

17

RETAIL SALES

Provide targeted directly at the point of purchase.

18

MUSEUMS

In museums holosonic spotlight can be used to describe about a

particular object to a person standing in front it, so that the other

person standing in front of another object will not be able to hear

the description.

19

Public Announcement: Highly focused announcement in noisy environments such as subways, airports, amusement parks, traffic intersections etc.

Military applications: Ship – to – ship communications and shipboard announcements.

.

Entertainment system: In home theatre system rear speakers can be eliminated by the implementation of audio spotlighting and the properties of sound can be improved

FUTURE OF AUDIO SPOT LIGHTENING

Holds the promise of replacing conventional speakers.

It allows the user to control the direction of propagation of sound. Will force the people to rethink their relationship with the sound.It really “put sound where you want it”.

CONCLUSION

Holosonic Audio spotlighting is really going to make a

revolution in sound transmission.

User can decide the path in which audio signal should

propagate.

Holosonic Audio spotlighting system is going to shape the

future of sound and will serve our ears with magical

experience.

23

24

Query

25