sound waves


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sound waves

In air, a succession of outwardly traveling layers of compression and rarefaction, capable of being detected by the ear.
References in periodicals archive ?
That study, published in the journal Physical Review B, looked at the behavior of phonons, which are akin to particles of sound waves like photons are to particles of light waves under quantum mechanics.
28 -- Headphones with Active Noise-cancelling (ANC) work by creating a sound wave, which is 180 degrees out of phase with the ambient sounds that are picked up by its microphones.
Essentially, the speed and intensity of these sound waves changes depending on the density and composition of the rocks they pass through.
This was the birth of KKT, or Khan Kinetic Treatment, which has since effectively treated thousands of cases of neck and back pain, spinal cord injuries, herniated discs, scoliosis, osteoarthritis, joint pain and headaches - using a very finely-developed form of vibratory sound waves. KKT Orthopedic Spine centres are a leading global network of pain treatment centres in 12 countries.
It has reported that plant produces sound waves at relatively low frequencies of 50-120 Hz (Hassanien et al., 2014).
Sound waves were much gentler and only applied a force to the exosomes for a second or less, said the researchers, whose work is reported in the journal Proceedings of the National Academy of Sciences.
Sharp vertical lines rise out of the wood to form a unique body, a visual representation of a sound wave.
However, a sound wave in flight through an enclosed compartment where the air has no wind currents in it will manifest one particular velocity while a sound wave propagating through the still air outside the compartment will manifest some other velocity--in a moving enclosed compartment the contained air's velocity is the same as the compartment's velocity and would add to or subtract from the sound wave's propagation velocity.
Medsonix was invented by a former contractor for the US Navy, Alphonse 'Al' Cassone, an American engineer who experimented with sound waves for 15 years.
In their paper published in Nature Scientific Reports, the researchers show how using metamaterials (synthetic materials composed of many individual, engineered cells that together produce unnatural properties) they can create any three-dimensional pattern they want using sound waves.
An ultrasound scan, sometimes called a sonogram, is a procedure that uses highfrequency sound waves to create an image of part of the inside of the body.
Astronomers are combing through the largest map of galaxies ever created to find the echoes of primordial sound waves.