It may be compounded by physical decline such as loss of driving ability, decreased hearing or vision.
More direct evidence from studies of experiments with animals and humans, however, suggests that we may have to alter the very concept of what we mean by hearing loss, and that current tests - particularly pure-tone audiometry which measures our ability to perform "pin-drop" hearing - may not be sufficient to pick up the early signs of a decline in hearing function.
Unlike after the 2007 election, which degenerated into tribe-on-tribe violence that damaged Kenya's reputation as a stable country, this time Odinga said he had faith in the judiciary's ability to give him a fair hearing.
Athletes who are charged by USADA can request a hearing, and if they lose, they have the ability to appeal to the Court of Arbitration for Sport, an international arbitration body.
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At an earlier hearing, Mr Goh's lawyer, David Klaus, questioned his ability to stand trial, saying that the 43-year-old had suffered from schizophrenia for several years.
Robots are already adept at all manner of things, from hunting to feeling, but over at Honda's Research Institute, one team is focused on an ability bots aren't so hot at yet -- hearing.
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"Sense, taste and smell and vision and hearing have a normal range, but there can be a hundred-fold between the ability of people to discern a taste or odour - it's not uncommon, " says Dietrich.
At the beginning of the Games, we were hearing wannabe-positive, slightly uncomfortable-sounding phrases - such as "see the ability not the disability" and "the athletes just want to be taken as seriously as the normal athletes" - from the media.
In a hearing Thursday, Judge Gerald Fisher, along with an appeals court, maintained restrictions on the media's ability to report on recent hearings in the case.
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