Deafness
Deafness spans medical hearing loss and cultural Deaf identity.
Deafness is a term with both medical and cultural definitions. In a medical context, it refers to hearing loss that prevents a person from understanding spoken language, even with amplification. In a cultural context, Deafness (often capitalized) denotes a community of people who primarily communicate through sign language and share distinct social norms, regardless of their hearing ability. The two definitions overlap but are not identical, and the term d/Deafness is used to encompass both meanings.
- medical_definition
- Hearing loss precluding understanding of spoken language
- cultural_definition
- Community using sign language as primary communication
- types_of_hearing_loss
- Conductive, sensorineural, mixed, auditory neuropathy spectrum disorder
- levels_of_hearing_loss
- Mild, moderate, severe, profound
- prevalence_in_US
- Fewer than 5% of Americans are deaf or hard of hearing at a level affecting normal conversation
- first_record_of_sign_language
- Plato's Cratylus, 5th century BCE
Lore & Background
The first known record of sign language appears in Plato's Cratylus from the fifth century BCE, where Socrates suggested that people without voice or tongue would communicate using signs. This view contrasted with Aristotle's assertion that those born deaf were incapable of reason.
Reader's Guide
Deafness is significant as a condition that affects millions globally, with both audiological and cultural dimensions. Medically, it encompasses four types of hearing loss—conductive, sensorineural, mixed, and auditory neuropathy spectrum disorder—each with levels from mild to profound. Solutions include hearing aids, devices using blinking lights, and cochlear implants, which are surgically placed to stimulate the cochlear nerve. Culturally, Deaf communities view Deafness as a language minority rather than a disability, with shared art, history, and institutions. Education for d/Deaf children involves two main paths: mainstreaming in public schools with accommodations, or attending specialized Deaf schools that use sign language. The legacy of Deafness includes ongoing debates about cochlear implants, the importance of early intervention, and the preservation of sign languages as vital to cultural identity.
Did You Know?
- The first known record of sign language is from Plato's Cratylus, written in the fifth century BCE.
- Cochlear implants may be surgically placed in children as young as nine months in the US.
- The left hemisphere of the brain processes linguistic patterns for both signed and spoken languages.
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