having loudspeakers twenty meters wide is not very useful.
to make a narrow beam of sound from a small acoustic source, we instead
generate only ultrasound
Through a combination of careful mathematical analysis and engineering
insight, the Audio Spotlight sound system has become the very first, and
still the only, sound beam system which generates low-distortion, high
quality sound in a reliable, professional package.The
HoloSonic Soundmasking System consists of our Computerized Soundmasking
- 1/3 Octave Equalizer Computerised Digital Signal Processor, a HoloSonic
Amplifier and a 12" HoloSonic Dish System.
A HoloSonic Soundmasking system consists of a Soundmasking Generator - 1/3 Octave Equalizer, a HoloSonic SoundBeam,
Signal Processor / Amplifier, and an HoloSonic Emitter/Transducer, 75'
Plenum Cable, and Installation Drawings.
The Soundmasking signal is converted to a highly complex ultrasonic signal
by the signal processor before being amplified and emitted into the air by
the SoundBeam Emitter / Transducer. Since the ultrasonic energy is highly
directional, it forms a virtual column of sound directly in front of the
emitter, much like the light from a flashlight. All along that column of
ultrasonic sound, the air is creating new sounds (the sound that we
originally converted to an ultrasonic wave). Since the sound that we hear
is created right in the column of ultrasonic energy, it does not spread in
all directions like the sound from a conventional loudspeaker, instead it
stays locked tightly inside the column of ultrasonic energy.