30-01-2012, 01:10 PM
audio spotlighting
[attachment=16826]
INTRODUCTION
It is the Production of focused beams of Sound
Combination of Non-Linear Acoustics & Fancy Mathematics.
Uses Ultra-sonic Energy to create Narrow beams of sound
Non Linearity of the air aid the device for its working
Devices used: Parametric Array, CMUTs
To Focus Sound into Narrow Beam
.A low beam angle
Smaller the wave length, Lesser the beam angle.
.Large aperture size
Increase aperture size of speakers
(10m dia for 20Hz) - practically difficult.
Properties of ultrasound:
The frequency ranges above 20 KHz
The wavelength is less than 2crn
Small beam angle hence highly coherent and directional.
COMPONENTS AND SPECIFICATIONS
.Audio Spotlight consists of three major components:
1. A Thin, Circular Transducer Array.
2. A Signal Processor .
3. An Amplifier.
.Works with principle of Non Linearity of Air
[attachment=16826]
INTRODUCTION
It is the Production of focused beams of Sound
Combination of Non-Linear Acoustics & Fancy Mathematics.
Uses Ultra-sonic Energy to create Narrow beams of sound
Non Linearity of the air aid the device for its working
Devices used: Parametric Array, CMUTs
To Focus Sound into Narrow Beam
.A low beam angle
Smaller the wave length, Lesser the beam angle.
.Large aperture size
Increase aperture size of speakers
(10m dia for 20Hz) - practically difficult.
Properties of ultrasound:
The frequency ranges above 20 KHz
The wavelength is less than 2crn
Small beam angle hence highly coherent and directional.
COMPONENTS AND SPECIFICATIONS
.Audio Spotlight consists of three major components:
1. A Thin, Circular Transducer Array.
2. A Signal Processor .
3. An Amplifier.
.Works with principle of Non Linearity of Air
