Acoustic Cloaking(January 11, 2008)
Physicists imagine an object invisible to sound waves.
Hyper-Focusing a Sound Wave(September 13, 2002)
Using a technique called "time-reversed acoustics," researchers have focused a sound wave to a tiny spot, much smaller than allowed by traditional methods.
Acoustic Lens(January 2, 2002)
Scientists in Spain are the first to use a "sonic crystal" to focus sound waves at audible frequencies.
Sound-Activated Filter(November 6, 2001)
Sound waves lead to an efficient, switchable fluid filter.
Acoustic Crystallization (June 1,
Ultrasound can be used to crystallize helium.
of Burns (November 11, 1999)
In an important development for medical ultrasound, researchers can now
take ultrasound pictures of the inside of the body--including painful
areas containing serious burns--with devices that do not require physical
contact with the patient.
(December 3, 1997)
See how ultrapowerful sound waves can replace mechanical parts in air
conditioners and refrigerators to compress gas molecules.
The Sonoluminescence Process
(August 5, 1996)
A depiction of sonoluminescence, the conversion of sound energy into light.
Sonoluminescence and Medical
Ultrasound (July 29, 1996)
Some of the sound energy used in medical ultrasound may be converted into
flashes of light.
(July 26, 1996)
Photograph of a cell producing sonoluminescence, in which sound energy
is converted into light.