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.
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News tagged with hearing loss
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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Active hearing process in mosquitoes
Nov 20, 2009 |
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A mathematical model has explained some of the remarkable features of mosquito hearing. In particular, the male can hear the faintest beats of the female's wings and yet is not deafened by loud noises.
Researchers create cell phones for sign language
Dec 02, 2009 |
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(PhysOrg.com) -- Cornell researchers and colleagues have created cell phones that allow deaf people to communicate in sign language, the same way hearing people use phones to talk.
Weight loss reduces sleep problems in obese men
Dec 04, 2009 |
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Weight loss reduces obstructive sleep apnoea in obese men, with the greatest effect seen in patients with severe disease, according to new research published in the British Medical Journal today.
Sony to enter car battery market: Stringer
Dec 03, 2009 |
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Sony Corp. will tap the rechargeable car battery market amid a growing focus on electric cars and green auto technology, chief executive Howard Stringer said Thursday.
Investigators identify successful weight control strategies for adolescents
Dec 01, 2009 |
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Adolescent obesity is a major public health problem that impacts one out of every three children, resulting in 4-5 million overweight youth in the United States. In a study published in the December 2009 issue of the Journal of ...
Novel carbon-trading scheme could stop large-scale extinctions
Dec 03, 2009 |
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A new strategy for saving tropical forest species was published in the leading journal Science on the eve of the United Nations Framework Convention on Climate Change in Copenhagen, Denmark, by a team of researchers, includ ...
Defects in T cells make West Nile virus more deadly in older adults
Dec 04, 2009 |
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(PhysOrg.com) -- West Nile virus is more deadly in older adults due to defects in T cells, according to a study conducted by researchers from the UA College of Medicine.
Obama science advisers grilled over hacked e-mails
Dec 03, 2009 |
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(AP) -- House Republicans pointed to controversial e-mails leaked from climate scientists and said it was evidence of corruption. Top administration scientists looking at the same thing found no such sign, saying it doesn't ...
Species down, disease up: Study shows biodiversity loss drives human infections
Dec 03, 2009 |
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The extinction of plant and animal species can be likened to emptying a museum of its collection, or dumping a cabinet full of potential medicines into the trash, or replacing every local cuisine with McDonald's burgers.
Tahoe faces new development battle: green vs. green
Dec 03, 2009 |
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As snow begins to blanket Lake Tahoe, the region finds itself facing a new kind of development battle: green vs. green.
List of search results for hearing loss
