Deafness

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Deafness has varying definitions in cultural and medical contexts. In medical contexts, the meaning of deafness is hearing loss that precludes a person from understanding spoken language, an audiological condition. [1] In this context it is written with a lower case d. It later came to be used in a cultural context to refer to those who primarily communicate through sign language regardless of hearing ability, often capitalized as Deaf and referred to as "big D Deaf" in speech and sign. [2] [3] The two definitions overlap but are not identical, as hearing loss includes cases that are not severe enough to impact spoken language comprehension, while cultural Deafness includes hearing people who use sign language, such as children of deaf adults.

Contents

Medical context

In a medical context, deafness is defined as a degree of hearing difference such that a person is unable to understand speech, even in the presence of amplification. [1] In profound deafness, even the highest intensity sounds produced by an audiometer (an instrument used to measure hearing by producing pure tone sounds through a range of frequencies) may not be detected. In total deafness, no sounds at all, regardless of amplification or method of production, can be heard.

Neurologically, language is processed in the same areas of the brain whether one is deaf or hearing. The left hemisphere of the brain processes linguistic patterns whether by signed languages or by spoken languages. [5]

Deafness can be broken down into four different types of hearing loss: conductive hearing loss, sensorineural hearing loss, mixed hearing loss, and auditory neuropathy spectrum disorder. All of these forms of hearing loss cause an impairment in a person's hearing where they are not able to hear sounds correctly. These different types of hearing loss occur in different parts of the ear, which make it difficult for the information being heard to get sent to the brain properly. To break it down even further, there are three different levels of hearing loss. According to the CDC, the first level is mild hearing loss. This is when someone is still able to hear noises, but it is more difficult to hear the softer sounds. The second level is moderate hearing loss and this is when someone can hear almost nothing when someone is talking to them at a normal volume. The next level is severe hearing loss. Severe hearing loss is when someone can not hear any sounds when they are being produced at a normal level and they can only hear minimum sounds that are being produced at a loud level. The final level is profound hearing loss, which is when someone is not able to hear any sounds except for very loud ones. [6]


There are millions of people in the world who are living with deafness or hearing impairments. Survey of Income and Program Participation (SIPP) indicate that fewer than 1 in 20 Americans are currently deaf or hard of hearing. [7] There are a lot of solutions available for people with hearing impairments. Some examples of solutions would be blinking lights on different things like their phones, alarms, and things that are important to alert them. Cochlear implants are an option too. [8] Cochlear implants are surgically placed devices that stimulate the cochlear nerve in order to help the person hear. A cochlear implant is used instead of hearing aids in order to help when someone has difficulties understanding speech. [9]

Cultural context

The flag of the deaf community made by Arnaud Balard Sign Union flag.svg
The flag of the deaf community made by Arnaud Balard

In a cultural context, Deaf culture refers to a tight-knit cultural group of people whose primary language is signed, and who practice social and cultural norms which are distinct from those of the surrounding hearing community. This community does not automatically include all those who are clinically or legally deaf, nor does it exclude every hearing person. According to Baker and Padden, it includes any person who "identifies him/herself as a member of the Deaf community, and other members accept that person as a part of the community", [10] an example being children of deaf adults with normal hearing ability. It includes the set of social beliefs, behaviors, art, literary traditions, history, values, and shared institutions of communities that are influenced by deafness and which use sign languages as the main means of communication. [2] [3] Members of the Deaf community tend to view deafness as a difference in human experience rather than a disability or disease. [11] [12]

Many non-disabled people continue to assume that deaf people have no autonomy and fail to provide people with support beyond hearing aids, which is something that must be addressed. Different non-governmental organizations around the world have created programs towards closing the gap between deaf and non-disabled people in developing countries. As children, deaf people learn literacy differently than hearing children. They learn to speak and write, whereas hearing children naturally learn to speak and eventually learn to write later on. [13] The Quota International organization with headquarters in the United States provided immense educational support in the Philippines, where it started providing free education to deaf children in the Leganes Resource Center for the Deaf. The Sounds Seekers British organization also provided support by offering audiology maintenance technology, to better assist those who are deaf in hard-to-reach places. The Nippon Foundation also supports deaf students at Gallaudet University and the National Technical Institute for the Deaf, through sponsoring international scholarships programs to encourage students to become future leaders in the deaf community. The more aid these organizations give to the deaf people, the more opportunities and resources disabled people must speak up about their struggles and goals that they aim to achieve. When more people understand how to leverage their privilege for the marginalized groups in the community, then we can build a more inclusive and tolerant environment for the generations that are yet to come. [2] [3]

History

The first known record of sign language in history comes from Plato's Cratylus, written in the fifth century BCE. In a dialogue on the "correctness of names", Socrates says, "Suppose that we had no voice or tongue, and wanted to communicate with one another, should we not, like the deaf and dumb, make signs with the hands and head and the rest of the body?" [14] His belief that deaf people possessed an innate intelligence for language put him at odds with his student Aristotle, who said, "Those who are born deaf all become senseless and incapable of reason," and that "it is impossible to reason without the ability to hear".

This pronouncement would reverberate through the ages and it was not until the 17th century when manual alphabets began to emerge, as did various treatises on deaf education, such as Reducción de las letras y arte para enseñar a hablar a los mudos ('Reduction of letters and art for teaching mute people to speak'), written by Juan Pablo Bonet in Madrid in 1620, and Didascalocophus, or, The deaf and dumb mans tutor, written by George Dalgarno in 1680.

In 1760, French philanthropic educator Charles-Michel de l'Épée opened the world's first free school for the deaf. The school won approval for government funding in 1791 and became known as the "Institution Nationale des Sourds-Muets à Paris." [15] The school inspired the opening of what is today known as the American School for the Deaf, the oldest permanent school for the deaf in the United States, and indirectly, Gallaudet University, the world's first school for the advanced education of the deaf and hard of hearing, and to date, the only higher education institution in which all programs and services are specifically designed to accommodate deaf and hard of hearing students.

See also

Related Research Articles

<span class="mw-page-title-main">Hearing loss</span> Partial or total inability to hear

Hearing loss is a partial or total inability to hear. Hearing loss may be present at birth or acquired at any time afterwards. Hearing loss may occur in one or both ears. In children, hearing problems can affect the ability to acquire spoken language, and in adults it can create difficulties with social interaction and at work. Hearing loss can be temporary or permanent. Hearing loss related to age usually affects both ears and is due to cochlear hair cell loss. In some people, particularly older people, hearing loss can result in loneliness.

The three models of deafness are rooted in either social or biological sciences. These are the cultural model, the social model, and themedicalmodel. The model through which the deaf person is viewed can impact how they are treated as well as their own self perception. In the cultural model, the Deaf belong to a culture in which they are neither infirm nor disabled, but rather have their own fully grammatical and natural language. In the medical model, deafness is viewed undesirable, and it is to the advantage of the individual as well as society as a whole to "cure" this condition. The social model seeks to explain difficulties experienced by deaf individuals that are due to their environment.

<span class="mw-page-title-main">Cochlear implant</span> Prosthesis

A cochlear implant (CI) is a surgically implanted neuroprosthesis that provides a person who has moderate-to-profound sensorineural hearing loss with sound perception. With the help of therapy, cochlear implants may allow for improved speech understanding in both quiet and noisy environments. A CI bypasses acoustic hearing by direct electrical stimulation of the auditory nerve. Through everyday listening and auditory training, cochlear implants allow both children and adults to learn to interpret those signals as speech and sound.

Lip reading, also known as speechreading, is a technique of understanding a limited range of speech by visually interpreting the movements of the lips, face and tongue without sound. Estimates of the range of lip reading vary, with some figures as low as 30% because lip reading relies on context, language knowledge, and any residual hearing. Although lip reading is used most extensively by deaf and hard-of-hearing people, most people with normal hearing process some speech information from sight of the moving mouth.

<span class="mw-page-title-main">Deaf culture</span> Culture of deaf persons

Deaf culture is the set of social beliefs, behaviors, art, literary traditions, history, values, and shared institutions of communities that are influenced by deafness and which use sign languages as the main means of communication. When used as a cultural label especially within the culture, the word deaf is often written with a capital D and referred to as "big D Deaf" in speech and sign. When used as a label for the audiological condition, it is written with a lower case d. Carl G. Croneberg coined the term "Deaf Culture" and he was the first to discuss analogies between Deaf and hearing cultures in his appendices C/D of the 1965 Dictionary of American Sign Language.

<span class="mw-page-title-main">Audiology</span> Branch of science that studies hearing, balance, and related disorders

Audiology is a branch of science that studies hearing, balance, and related disorders. Audiologists treat those with hearing loss and proactively prevent related damage. By employing various testing strategies, audiologists aim to determine whether someone has normal sensitivity to sounds. If hearing loss is identified, audiologists determine which portions of hearing are affected, to what degree, and where the lesion causing the hearing loss is found. If an audiologist determines that a hearing loss or vestibular abnormality is present, they will provide recommendations for interventions or rehabilitation.

Unilateral hearing loss (UHL) is a type of hearing impairment where there is normal hearing in one ear and impaired hearing in the other ear.

Audism as described by deaf activists is a form of discrimination directed against deaf people, which may include those diagnosed as deaf from birth, or otherwise. Tom L. Humphries coined the term in his doctoral dissertation in 1975, but it did not start to catch on until Harlan Lane used it in his writing. Humphries originally applied audism to individual attitudes and practices; whereas Lane broadened the term to include oppression of deaf people.

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 strategies for communication and for living, which became the kernel for the development of American Deaf culture.

<span class="mw-page-title-main">Cortical deafness</span> Medical condition

Cortical deafness is a rare form of sensorineural hearing loss caused by damage to the primary auditory cortex. Cortical deafness is an auditory disorder where the patient is unable to hear sounds but has no apparent damage to the structures of the ear. It has been argued to be as the combination of auditory verbal agnosia and auditory agnosia. Patients with cortical deafness cannot hear any sounds, that is, they are not aware of sounds including non-speech, voices, and speech sounds. Although patients appear and feel completely deaf, they can still exhibit some reflex responses such as turning their head towards a loud sound.

<span class="mw-page-title-main">Deaf education</span> Education of the deaf and hard of hearing

Deaf education is the education of students with any degree of hearing loss or deafness. This may involve, but does not always, individually-planned, systematically-monitored teaching methods, adaptive materials, accessible settings, and other interventions designed to help students achieve a higher level of self-sufficiency and success in the school and community than they would achieve with a typical classroom education. There are different language modalities used in educational setting where students get varied communication methods. A number of countries focus on training teachers to teach deaf students with a variety of approaches and have organizations to aid deaf students.

Prelingual deafness refers to deafness that occurs before learning speech or language. Speech and language typically begin to develop very early with infants saying their first words by age one. Therefore, prelingual deafness is considered to occur before the age of one, where a baby is either born deaf or loses hearing before the age of one. This hearing loss may occur for a variety of reasons and impacts cognitive, social, and language development.

The Deaf community over time has worked to improve the educational system for those who are Deaf and hard of hearing. The history of Deaf education dates back to Ancient Egypt where the deaf were respected and revered. In contrast, those who were deaf in Ancient Greece were considered a burden to society and put to death. The educational aspects of the deaf community has evolved tremendously and still continues to grow as the science of linguistics, educational research, new technologies, and laws, on local, national, and international levels are steadily being introduced. Strategies, however, remain controversial.

Language acquisition is a natural process in which infants and children develop proficiency in the first language or languages that they are exposed to. The process of language acquisition is varied among deaf children. Deaf children born to deaf parents are typically exposed to a sign language at birth and their language acquisition follows a typical developmental timeline. However, at least 90% of deaf children are born to hearing parents who use a spoken language at home. Hearing loss prevents many deaf children from hearing spoken language to the degree necessary for language acquisition. For many deaf children, language acquisition is delayed until the time that they are exposed to a sign language or until they begin using amplification devices such as hearing aids or cochlear implants. Deaf children who experience delayed language acquisition, sometimes called language deprivation, are at risk for lower language and cognitive outcomes. However, profoundly deaf children who receive cochlear implants and auditory habilitation early in life often achieve expressive and receptive language skills within the norms of their hearing peers; age at implantation is strongly and positively correlated with speech recognition ability. Early access to language through signed language or technology have both been shown to prepare children who are deaf to achieve fluency in literacy skills.

<span class="mw-page-title-main">Deaf rights movement</span>

The Deaf rights movement encompasses a series of social movements within the disability rights and cultural diversity movements that encourages deaf and hard of hearing to push society to adopt a position of equal respect for them. Acknowledging that those who were Deaf or hard of hearing had rights to obtain the same things as those hearing lead this movement. Establishing an educational system to teach those with Deafness was one of the first accomplishments of this movement. Sign language, as well as cochlear implants, has also had an extensive impact on the Deaf community. These have all been aspects that have paved the way for those with Deafness, which began with the Deaf Rights movement.

The deaf community in Australia is a diverse cultural and linguistic minority group. Deaf communities have many distinctive cultural characteristics, some of which are shared across many different countries. These characteristics include language, values and behaviours. The Australian deaf community relies primarily on Australian Sign Language, or Auslan. Those in the Australian deaf community experience some parts of life differently than those in the broader hearing world, such as access to education and health care.

Language deprivation in deaf and hard-of-hearing children is a delay in language development that occurs when sufficient exposure to language, spoken or signed, is not provided in the first few years of a deaf or hard of hearing child's life, often called the critical or sensitive period. Early intervention, parental involvement, and other resources all work to prevent language deprivation. Children who experience limited access to language—spoken or signed—may not develop the necessary skills to successfully assimilate into the academic learning environment. There are various educational approaches for teaching deaf and hard of hearing individuals. Decisions about language instruction is dependent upon a number of factors including extent of hearing loss, availability of programs, and family dynamics.

Language exposure for children is the act of making language readily available and accessible during the critical period for language acquisition. Deaf and hard of hearing children, when compared to their hearing peers, tend to face more hardships when it comes to ensuring that they will receive accessible language during their formative years. Therefore, deaf and hard of hearing children are more likely to have language deprivation which causes cognitive delays. Early exposure to language enables the brain to fully develop cognitive and linguistic skills as well as language fluency and comprehension later in life. Hearing parents of deaf and hard of hearing children face unique barriers when it comes to providing language exposure for their children. Yet, there is a lot of research, advice, and services available to those parents of deaf and hard of hearing children who may not know how to start in providing language.

Treatment depends on the specific cause if known as well as the extent, type, and configuration of the hearing loss. Most hearing loss results from age and noise, is progressive, and irreversible. There are currently no approved or recommended treatments to restore hearing; it is commonly managed through using hearing aids. A few specific types of hearing loss are amenable to surgical treatment. In other cases, treatment involves addressing underlying pathologies, but any hearing loss incurred may be permanent.

In Ireland, 8% of adults are affected by deafness or severe hearing loss. In other words, 300,000 Irish require supports due to their hearing loss.

References

  1. 1 2 Elzouki AY (2012). Textbook of clinical pediatrics (2 ed.). Berlin: Springer. p. 602. ISBN   9783642022012. Archived from the original on 2015-12-14.
  2. 1 2 3 Padden, Carol A.; Humphries, Tom (Tom L.) (2005). Inside Deaf Culture. Cambridge, MA: Harvard University Press. p. 1. ISBN   978-0-674-01506-7.
  3. 1 2 3 Jamie Berke (9 February 2010). "Deaf Culture - Big D Small D". About.com. Archived from the original on 4 March 2016. Retrieved 22 November 2013.
  4. ↑ "International Deafness Symbol". Deafness Forum Australia. Retrieved 2022-11-18.
  5. ↑ Campbell, Ruth; et al. (29 June 2007). "Sign Language and the Brain: A Review". Journal of Deaf Studies and Deaf Education. pp. 3–20. doi:10.1093/deafed/enm035. PMID   17602162 . Retrieved 14 Dec 2020.
  6. ↑ "Hearing Loss in Children". 21 June 2021.
  7. ↑ Mitchell, R. E. (2005-10-12). "How Many Deaf People Are There in the United States? Estimates From the Survey of Income and Program Participation". Journal of Deaf Studies and Deaf Education. 11 (1): 112–119. doi: 10.1093/deafed/enj004 . ISSN   1081-4159. PMID   16177267.
  8. ↑ "Know-the-ADA".
  9. ↑ "Cochlear Implant Surgery". 18 July 2022.
  10. ↑ Baker, Charlotte; Carol Padden (1978). American Sign Language: A Look at Its Story, Structure and Community.
  11. ↑ Ladd, Paddy (2003). Understanding Deaf Culture: In Search of Deafhood. Multilingual Matters. p. 502. ISBN   978-1-85359-545-5.
  12. ↑ Lane, Harlan L.; Richard Pillard; University Press (2011). The People of the Eye: Deaf Ethnicity and Ancestry. p. 269. ISBN   978-0-19-975929-3.
  13. ↑ Wong, Fay; Tang, Gladys; Li, Qun; Yiu, Chris Kun-Man (2021). "Literacy Learning of Deaf and Hearing Preschoolers in a Sign Bilingual, Coenrollment Setting in Hong Kong". American Annals of the Deaf. 166 (4): 527–553. doi:10.1353/aad.2021.0034. ISSN   1543-0375.
  14. ↑ "Cratylus, by Plato". gutenberg.org. Retrieved 2022-02-05.
  15. ↑ "Institut National de Jeunes Sourds de Paris" (PDF).
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