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Whats Audio Spot light?

Audio spot lighting is a very recent technology

that creates focused beams of sound similar

to light beams coming out of a flashlight.

By shining sound to one location, specific

listeners can be targeted with sound without

others nearby hearing it, i.e. to focus sound

into a coherent and highly directional beam.

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Directed audio

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What are we Using for it?

The Audio Spotlight uses ultrasonicenergy to create extremely narrowbeams of sound that behave like

beams of light. parametric array employs the

nonlinearity of the air to createaudible by-products from inaudibleultrasound.

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How present day speaker works?

They are direct radiating

Audible portions of sound tend to spread out

in all directions from the point of origin.

They do not travel as narrow beams.

beam angle of audible sound is very wide

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Problem with present day speakers

In order to focus sound into a narrow

beam, you need to maintain a low beam

angle that is dictated by wavelength. The

smaller the wavelength, the less thebeam angle, and hence, the more focused

the sound.

To create a narrow sound beam, the

aperture size of the source also matters.

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What audio spotlight consists of?

Audio spotlight looks like a disc-

shaped loudspeaker, trailing a wire,

with a small laser guide-beam

mounted in the middle. When one points the flat side of

the disc in your direction, you hear

whatever sound he's chosen to play

for you but when he turns the disc

away, the sound fades almost to

nothing.

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Audio spot light

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COMPONENTS AND SPECIFICATIONS

Audio Spotlight consists of three majorcomponents: a thin, circular transducer

array, a signal processor and an amplifier.

The

Transducer- .5 inches (1.27 cm) thick

area 1 foot (30.48 cm)

signal processor and amplifier are

integrated into a system about the size ofa traditional audio amplifier, and they use

about the same amount of power.

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DIFFERENCE IN MODULATING AUDIBLE

FREQUENCIES WITH ULTRASONIC CARRIER

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The speech and music signals are mixed with

the pure ultrasound carrier wave, and theresultant hybrid wave is then broadcast.

As this wave moves through the air, it creates

complex distortions that give rise to two new

frequency sets, one slightly higher and oneslightly lower than the hybrid wave.

These two sidebands interfere with the hybrid

wave and produce two signal components.

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There are two ways to use Audio Spotlight. First,

it can direct sound at a specific target, creating acontained area of listening space which is called

Direct Audio. Second, it can bounce off of a

second object, creating an audioimage.

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Comparing With conventional speaker

Highly focused

High Directivity

Uses non linearity for demodulation Direct and Projected audio

High cost effective

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Applications.

The directed audio technology is going to tap a huge

commercial market in entertainment and in consumer

electronics, and the technology developers are scrambling to

tap into that market.

There are also other interesting applications that they are

looking at, such as private messaging using this system

without headphones special effects at presentations as well as

special sound theme parks that could put up animated sound

displays similar to todays light shows.

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CONCLUSION

Being the most radical technologicaldevelopment in acoustics since the coil

loudspeaker was invented in 1925... The audiospotlight will force people to rethink theirrelationship with sound

So we can conclude- Audio Spotlighting reallyput sound where you want it and will be AREAL BOON TO THE FUTURE.

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