Longitudinal wave
hideLongitudinal waves are waves that have same direction of oscillations or vibrations along or parallel to their direction of travel, which means that the oscillations of the medium (particle) is in the same direction or opposite direction as the motion of the wave. Mechanical longitudinal waves have been also referred to as compressional waves or compression waves.
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News tagged with sound waves
Micro honeycomb materials enable new physics in aircraft sound reduction
Sep 29, 2008 |
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Noise from commercial and military jet aircraft causes environmental problems for communities near airports, obliging airplanes to follow often complex noise-abatement procedures on takeoff and landing. It ...
A sonic boom in the world of lasers
Jun 17, 2009 |
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It was an idea born out of curiosity in the physics lab, but now a new type of ‘laser’ for generating ultra-high frequency sound waves instead of light has taken a major step towards becoming a unique and highly useful 21st ...
First hyperlens for sound waves created
Oct 25, 2009 |
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Ultrasound and underwater sonar devices could "see" a big improvement thanks to development of the world's first acoustic hyperlens. Created by researchers with the U.S. Department of Energy's Lawrence Berkeley ...
Scientists first to trap light and sound vibrations together in nanocrystal
Oct 26, 2009 |
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(PhysOrg.com) -- Researchers at the California Institute of Technology have created a nanoscale crystal device that, for the first time, allows scientists to confine both light and sound vibrations in the ...
New flat flexible speakers might even help you catch planes and trains
Apr 01, 2009 |
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(PhysOrg.com) -- A groundbreaking new loudspeaker, less than 0.25mm thick, has been developed by University of Warwick engineers, it's flat, flexible, could be hung on a wall like a picture, and its particular ...
Dutch PhD student develops device to combat noise
Dec 01, 2009 |
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Johan Wesselink of the University of Twente, The Netherlands, has developed a device to actively combat noise nuisance. This invention curtails sound waves and vibrations by producing anti-noise. The researcher is confident ...
Groundbreaking, inexpensive, pocket-sized ultrasound device can help treat cancer, relieve arthritis
Dec 19, 2008 |
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(PhysOrg.com) -- A prototype of a therapeutic ultrasound device, developed by a Cornell graduate student, fits in the palm of a hand, is battery-powered and packs enough punch to stabilize a gunshot wound ...
Hearing on the wing: New structure discovered in butterfly ears
Oct 21, 2009 |
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(PhysOrg.com) -- A clever structure in the ear of a tropical butterfly that potentially makes it able to distinguish between high and low pitch sounds has been discovered by scientists from the University ...
Shifting sound to light may lead to better computer chips
Mar 16, 2009 |
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By reversing a process that converts electrical signals into sounds heard out of a cell phone, researchers may have a new tool to enhance the way computer chips, LEDs and transistors are built.
Revolutionizing the diagnosis of serious disease
Nanotechnology / Bio & Medicine
Jun 02, 2009 |
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Revolutionary ultrasonic nanotechnology that could allow scientists to see inside a patient's individual cells to help diagnose serious illnesses is being developed by researchers at The University of Nottingham.
Music is the engine of new lab-on-a-chip device (w/ Video)
Jul 22, 2009 |
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(PhysOrg.com) -- Music, rather than electromechanical valves, can drive experimental samples through a lab-on-a-chip in a new system developed at the University of Michigan. This development could significantly simplify the ...
A sound practice: Cochlear implants restore children's hearing
Nov 05, 2009 |
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(PhysOrg.com) -- Ava Martin seems less nervous than her parents as the three sit in an audiologist’s office at UC Irvine Medical Center a few days after Labor Day. In August, the 6-year-old had surgery to place a cochlear ...
New algorithms for computerized, large-scale surveillance
20 hours ago |
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A recent AFOSR-funded technology should enable the Air Force to achieve advances in object and target detection technology by using sophisticated algebraic theories called groups, rings and fields.
Good vibrations: Devices aid the deaf by translating sound waves to vibrations
Feb 26, 2009 |
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(PhysOrg.com) -- Lip reading is a critical means of communication for many deaf people, but it has a drawback: Certain consonants (for example, p and b) can be nearly impossible to distinguish by sight alone.
Technology and Art Unite to Create Dance Show Based on Volcanic Sounds of the Earth (w/Video)
Mar 26, 2009 |
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(PhysOrg.com) -- For the first time ever, a modern dance company has performed to music generated from seismic data, recorded from four volcanoes across three continents. This unique event was facilitated by DANTE, the provider ...
