PROCESSING OF AUDIO SPOT LIGHTING PRESENTED BY, KEERTHANA.M. ECE-B II-YEAR.
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PROCESSING OF AUDIO SPOT LIGHTING
PRESENTED BY,KEERTHANA.M.ECE-B II-YEAR.
ABSTRACT:oA very trendy technology that
creates passion in all minds .oWhich creates focused beams
of sound similar to light beam coming out of flash light.
oWorks on the basis of non-linear acoustics
oTargeted listeners can only hear whereas others near by could not so.
PROPERTIES:
• Highly directive• Small wavelength.• Reaches target at very low
dispersion.• No side lobes The property is as similar to
that of the coherent light beam of laser light.
INTRODUCTION:• Developed by American
Technology Corporation.• Parametric array is the device
employs the non-linearity of air.• To create a audible
byproducts from inaudible ultrasound.• Resulting in extremely a very
directive and beam like sound
TECHNOLOGY OVERVIEW:
• Ultrasonic energy to create a extremely a very narrow beam of sound that behaves like a light wave.
• Very small wavelength and greater frequency that human can’t hear.
RANGE OF HEARING:
• Audible range of human ears is 20Hz to 20KHz.• For ultrasonic it is beyond
20KHz to20 MHz
BLOCK DIAGRAM OF AN AUDIO SPOT LIGHTING:
MAIN COMPONENTS :• Amplifier: It amplifies the low
frequency signal to high frequency ultrasonic sound.
• Sound processor: To produce the clean signal by eliminating the distortion.
• Transducer: To convert the digital sound signal into the audible signal.
CIRCULAR TRANSDUCER ARRAY:
WORKING:
• The original low frequency signal is fed into the system.• Low frequency signal is
modulated with ultra sonic frequency ranging from 21kHz to 28kHz.• The wavelength is small its
degree is 3,the sound beam will be narrow one with small dispersion.
AUDIO SPOT LIGHTING EMITTER:
CONVENTIONAL SPEAKER AND AUDIO SPOT LIGHTING:
ASP CONVENTIONAL SPEAKER
ADVANTAGES:
• Can focus to the concerned target• Dispersion can be controlled.• Highly cost effective.• Maintenance is less.• There is no lag in reproducing
the sound.
APPLICATIONS:
• Automobiles • Retail sales• Safety officials• Public announcement• Emergency rescue• Entertainment system• Sound bullets
CONCLUSION:
Revolution in sound transmission
Due to the unidirectional propagation it finds large no. of applications in all fields.
It is going to shape the future of sound and will serve our ears with magical experience.
IN FUTURE????Audio spot lighting system
holds the promise of replacing conventional speakers.• It helps to control the
direction of the propagation of sound.• Audio spot lighting is really
”PUT SOUND WHERE YOU WANT IT”.
THANK YOU!
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