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!