Related topics: hearing loss
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
The number of 85-year-olds will increase by a third by 2020
Dec 23, 2009 |
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Health and social care provision needs to be put in place for a large increase (33%) in the 85 year old population in the UK by 2020, according to a study published today in the British Medical Journal.
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On the tip of your tongue: Researchers reveal our motor system activates when we hear speech
Medicine & Health / Neuroscience
Dec 22, 2009 |
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(PhysOrg.com) -- Researchers from Royal Holloway, University of London have discovered our motor system activates automatically when we hear speech. These findings could, in the future, play a central role ...
Disability may be on the rise again after 20-year decline
Dec 21, 2009 |
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(PhysOrg.com) -- Disability rates among non-institutionalized older Americans increased between 2000 and 2005, a trend that could seriously impact the quality of life of seniors in the coming decades if it continues, according ...
Oceans becoming noisier thanks to pollution -- report
Dec 20, 2009 |
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The world's oceans are becoming noisier thanks to pollution, with potentially harmful effects for whales, dolphins and other marine life, US scientists said in a study published Sunday.
Major volcanic eruption feared in Philippines
Space & Earth / Earth Sciences
Dec 20, 2009 |
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(AP) -- The Philippines' most active volcano could have a huge eruption within days, officials warned Sunday after detecting a drastic surge in earthquakes and eerie rumbling sounds in surrounding foothills. ...
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