American Technology Corporation has released
a revolutionary new type of loudspeaker system called Hypersonic
Sound.
HSS sound reproduction technology actually creates audible, highly
directional sound right in the air by using ultrasonic energy. For
the first time, a commercialized technology that can focus sound
exactly where you want it.
The basic operating principle of HSS uses a property of air known
as "non-linearity". A normal sound wave (like someone talking) is
a small pressure wave that travels through the air. As the
pressure goes up and down, the "non-linear" nature of the air
itself causes the sound wave to be changed slightly. If you change
a sound wave, new sounds (frequencies) are formed within the wave.
Therefore, if we know how the air affects the sound waves, we can
predict exactly what new frequencies (sounds) will be added into
the sound wave by the air itself. An ultrasonic (beyond the range
of human hearing) sound wave can be sent into the air with
sufficient volume to cause the air to create these new
frequencies. Since we cannot hear the ultrasonic sound, we only
hear the new sounds that are formed by the non-linear action of
the air.
The benefit of the HSS system is the ability to direct or focus
sound into a tight beam, similar to the beam of light from the
flashlight. No other audio reproduction device available today
provides this unique ability. The opportunities for applying this
characteristic to the reproduction of sound are limitless. Think
about the ability in a museum to direct the narration about a
specific display only to the people standing directly in front of
it. How about the potential to reflect the rear channels of your
surround TV to the rear wall of your living room or directly to
only the driver of a car.
The Transistor invented in 1948 by J. Bardeen, W.
Shockley and W. Brattain was invented by accident. They were
experimenting with a diode when they discovered their creation.