3. 18-02-2015 RRIMT/EC/3rd Yr/6th Sem/Seminar 3
INTRODUCTION
WHAT 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
5. 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 RRIMT/EC/3rd Yr/6th Sem/Seminar 5
THEORY
6. The original low frequency sound waves such as
human speech or music are applied into an audio
spotlight emitter device
This low frequency signal is frequency modulated
with ultrasonic frequencies
Since ultrasonic frequency is used the wavelength
of the combined signal will be in the order of few
millimeters
Since 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
18-02-2015 RRIMT/EC/3rd Yr/6th Sem/Seminar 6
10.
Audio Spotlight consists of following major components:
Sound beam processor/amplifier
Frequency oscillator
Modulator
Microcontroller
Power supply
Audio Spotlight transducer
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COMPONENT &
SPECIFICATION
11.
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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
12.
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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
13.
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
15.
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
16.
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APPLICATION 1
Audio Spotlight
speakers allow visitor
to enjoy music while
other read nearby
peace & quiet
17.
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APPLICATION 2
Using this technology
two person can hear
different sound while
standing close to each
other
18.
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APPLICATION 3
The US Navy using this
technology on deck as a
substitute to the radio
operator's headphones
19.
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
20.
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
21.
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
