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*2: unwilling to hear or [[listen]] : not to be persuaded <was overwrought and deaf to [[reason]]>
*2: unwilling to hear or [[listen]] : not to be persuaded <was overwrought and deaf to [[reason]]>
==Description==
==Description==
''Hearing loss'', '''deafness''', hard of hearing, ''anacusis'', or ''hearing impairment'' (a term considered derogatory by many in the [http://en.wikipedia.org/wiki/Deaf_community deaf community], is a partial or total inability to hear. In [[children]] it may affect the development of [[language]] and can cause work related difficulties for adults.
''Hearing loss'', '''deafness''', ''hard of hearing'', ''anacusis'', or ''hearing impairment'' (a term considered derogatory by many in the [http://en.wikipedia.org/wiki/Deaf_community deaf community], is a partial or total inability to hear. In [[children]] it may affect the development of [[language]] and can cause work related difficulties for adults.
Hearing loss is caused by many [[factors]], including: [[genetics]], age, [[exposure]] to [[noise]], illness, chemicals and physical [[trauma]]. Hearing testing may be used to determine the severity of the hearing loss. While the results are [[expressed]] in decibels, hearing loss is usually described as mild, mild-moderate, moderate, moderately severe, severe, or [[profound]]. Hearing loss is usually acquired by a person who at some point in [[life]] had no hearing loss.
Hearing loss is caused by many [[factors]], including: [[genetics]], age, [[exposure]] to [[noise]], illness, chemicals and physical [[trauma]]. Hearing testing may be used to determine the severity of the hearing loss. While the results are [[expressed]] in decibels, hearing loss is usually described as mild, mild-moderate, moderate, moderately severe, severe, or [[profound]]. Hearing loss is usually acquired by a person who at some point in [[life]] had no hearing loss.