Digital Signal Processing Lab
 Introduction

 



 
 

 

  

What is AudioBEAM?

AudioBEAM is a new sound delivery system. The sound generated is highly directional. This is possible as it utilizes ultrasonic waves to modulate the sound information. The non-linear interaction of the waves in air will self-demodulate the waves. As a result of this self-demodulation effect, the audible sound is generated in air directly.

 

 
 

Why the word BEAM?
Using this technology, sound can be transmitted in a narrow beam unlike conventional loudspeakers where the sound produced are omni-directional (i.e. can be heard in all directions). By being able to control the directivity of the sound, it is possible to project sound to a precise location.


AudioBEAM could be used to create a private listening space where only those within the space will hear the audio. There are two mode of operation. The first being which the sound is projected directly to the audience (Direct Projection) while the in the second mode, sound is projected against a reflecting surface so that it could be reflected to create a virtual loudspeaker. (Indirect Projection).