Hearing impairment
hideA hearing impairment or deafness is a full or partial decrease in the ability to detect or understand sounds. Caused by a wide range of biological and environmental factors, loss of hearing can happen to any organism that perceives sound. "Hearing impaired" is often used to refer to those who are deaf, although the term is viewed negatively by members of Deaf culture, who prefer the terms "Deaf" and "Hard of Hearing".
Sound waves vary in amplitude and in frequency. Amplitude is the sound wave's peak pressure variation. Frequency is the number of cycles per second of a sinusoidal component of a sound wave. Loss of the ability to detect some frequencies, or to detect low-amplitude sounds that an organism naturally detects, is a hearing impairment.
For more information about Hearing impairment, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with hearing
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 ...
Squeak, squeak -- can you hear me now?
Medicine & Health / Neuroscience
Nov 09, 2009 |
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What do you get when you cross a mouse with poor hearing and a mouse with even worse hearing? Ironically, a new strain of mice with "golden ears" - mice that have outstanding hearing as they age.
Now hear this: Mouse study sheds light on hearing loss in older adults
Nov 09, 2009 |
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(PhysOrg.com) -- Becoming "hard of hearing" is a standard but unfortunate part of aging: A syndrome called age-related hearing loss affects about 40 percent of people over 65 in the United States, and will afflict an estimated ...
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Girl's progress after pioneering brain surgery gives hope to other parents
Nov 26, 2009 |
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Lexi Haas is awakening into a world of new possibilities. Miracle by tiny miracle, she is making her body do what she wants -- instead of her body always controlling her. She looked up at her mother a few weeks ago, pursed ...
Long-term testicular cancer survivors at high risk for neurological side effects
Nov 25, 2009 |
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Long-term survivors of testicular cancer who were treated with cisplatin-based chemotherapy had more severe side effects, including neurological side effects and Raynaud-like phenomena, than men who were not treated with ...
Auditory illusion: How our brains can fill in the gaps to create continuous sound
Medicine & Health / Neuroscience
Nov 25, 2009 |
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It is relatively common for listeners to "hear" sounds that are not really there. In fact, it is the brain's ability to reconstruct fragmented sounds that allows us to successfully carry on a conversation in a noisy room. ...
Autism treatment: Risky alternative therapies have little basis in science
Nov 24, 2009 |
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James Coman's son has an unusual skill. The 7-year-old, his father says, can swallow six pills at once. Diagnosed with autism as a toddler, the Chicago boy had been placed on an intense regimen of supplements and medications ...
Rare economic espionage case ends in jury deadlock
Nov 24, 2009 |
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(AP) -- Two men accused of the rare charge of economic espionage against the U.S. have been acquitted on two counts, but they could face a retrial on three other counts on which a jury deadlocked.
Rocket science leads to new whale discovery
Nov 24, 2009 |
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Rocket science is opening new doors to understanding how sounds associated with Navy sonar might affect the hearing of a marine mammal - or if they hear it at all.
Trying last-ditch lung bypass for worst swine flu
Nov 23, 2009 |
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(AP) -- A technology originally developed for premature babies may be helping to save some of the sickest swine flu patients by rerouting their blood so their lungs can rest.
Baby can wait as expectant dad finishes spacewalk
Space & Earth / Space Exploration
Nov 21, 2009 |
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(AP) -- A spacewalking astronaut put aside the impending birth of his daughter and blazed through his first-ever venture outside the International Space Station on Saturday.
Google books hearing set for February 18
Nov 20, 2009 |
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A US judge set February 18 for a hearing on the revised legal settlement between Google and US authors and publishers that would allow the Internet giant to scan and sell millions of books online.
The court will now call its expert witness: the brain
Medicine & Health / Neuroscience
Nov 20, 2009 |
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(PhysOrg.com) -- Will advances in neuroscience make the justice system more accurate and unbiased? Or could brain-based testing wrongly condemn some and trample the civil liberties of others? The new field ...
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