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Hearing loss has multiple causes, including ageing, genetics, perinatal problems and acquired causes like noise and disease. For some kinds of hearing loss the cause may be classified as of unknown cause. There is a progressive loss of ability to hear high frequencies with aging known as presbycusis. For men, this can start as early as 25 and ...
Specialty. Neurology, psychiatry. In human development, muteness or mutism (from Latin mutus 'silent') is defined as an absence of speech, with or without an ability to hear the speech of others. [1] Mutism is typically understood as a person's inability to speak, and commonly observed by their family members, caregivers, teachers, doctors or ...
Keller became a world-famous speaker and author. She was an advocate for people with disabilities, amid numerous other causes. She traveled to twenty-five different countries giving motivational speeches about Deaf people's conditions. [43] She was a suffragist, pacifist, radical socialist, birth control supporter, and opponent of Woodrow Wilson.
Deafblindness is the condition of little or no useful hearing and little or no useful sight. [1][2] Different degrees of vision loss and auditory loss occur within each individual. [3] Because of this inherent diversity, each deafblind individual's needs regarding lifestyle, communication, education, and work need to be addressed based on their ...
Sign languages (also known as signed languages) are languages that use the visual-manual modality to convey meaning, instead of spoken words. Sign languages are expressed through manual articulation in combination with non-manual markers. Sign languages are full-fledged natural languages with their own grammar and lexicon. [1]
One concluded that deaf drivers were safer than hearing drivers, one concluded that deaf and hearing female drivers performed similarly but deaf male drivers crashed more frequently, and the other ...
Deaf-mute. Deaf-mute is a term which was used historically to identify a person who was either deaf and used sign language or both deaf and could not speak. The term continues to be used to refer to deaf people who cannot speak an oral language or have some degree of speaking ability, but choose not to speak because of the negative or unwanted ...
In the United States, deaf culture was born in Connecticut in 1817 at the American School for the Deaf, when a deaf teacher from France, Laurent Clerc, was recruited by Thomas Gallaudet to help found the new institution. Under the guidance and instruction of Clerc in language and ways of living, deaf American students began to evolve their own ...