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. Deaf people usually have little to no hearing.
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.
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.
The Royal National Institute for Deaf People (RNID), known as Action on Hearing Loss from 2011 to 2020, is a charitable organization working on behalf of the UK's 9 million people who are deaf or have hearing loss.
Auditory neuropathy (AN) is a hearing disorder in which the outer hair cells of the cochlea are present and functional, but sound information is not transmitted sufficiently by the auditory nerve to the brain. Hearing loss with AN can range from normal hearing sensitivity to profound hearing loss.
Sound Seekers was a British charity which works to improve the lives of deaf children and children with ear diseases in the developing countries of the Commonwealth of Nations. It provided specialist equipment, training and support to some of the poorest countries of the world, where people with the 'hidden disability' of deafness may otherwise not receive the help they need. In 2020, Sound Seekers merged with DeafKidz International, with the combined charity using the DeafKidz International name.
Pure-tone audiometry is the main hearing test used to identify hearing threshold levels of an individual, enabling determination of the degree, type and configuration of a hearing loss and thus providing a basis for diagnosis and management. Pure-tone audiometry is a subjective, behavioural measurement of a hearing threshold, as it relies on patient responses to pure tone stimuli. Therefore, pure-tone audiometry is only used on adults and children old enough to cooperate with the test procedure. As with most clinical tests, standardized calibration of the test environment, the equipment and the stimuli is needed before testing proceeds. Pure-tone audiometry only measures audibility thresholds, rather than other aspects of hearing such as sound localization and speech recognition. However, there are benefits to using pure-tone audiometry over other forms of hearing test, such as click auditory brainstem response (ABR). Pure-tone audiometry provides ear specific thresholds, and uses frequency specific pure tones to give place specific responses, so that the configuration of a hearing loss can be identified. As pure-tone audiometry uses both air and bone conduction audiometry, the type of loss can also be identified via the air-bone gap. Although pure-tone audiometry has many clinical benefits, it is not perfect at identifying all losses, such as ‘dead regions’ of the cochlea and neuropathies such as auditory processing disorder (APD). This raises the question of whether or not audiograms accurately predict someone's perceived degree of disability.
Marion Downs was an American audiologist and Professor Emerita at the University of Colorado Health Sciences Center, Denver, who pioneered universal newborn hearing screening in the early 1960s, then spent more than 30 years trying to convince her peers to adopt the testing in hospitals and to place hearing aids on infants who showed hearing loss. She worked to alert the medical world to the developmental problems associated with childhood deafness. As a result of her efforts, 95 percent of all newborns in America today are screened for hearing loss. She devoted her professional life to the promotion of early identification of hearing loss in newborns, infants, and young children and to helping deaf and hard of hearing individuals lead fulfilling lives.
Universal neonatal hearing screening (UNHS), which is part of early hearing detection and intervention (EHDI) programmes, refer to those services aimed at screening hearing of all newborns, regardless of the presence of a risk factor for hearing loss. UNHS is the first step in the EHDI program which indicates whether a newborn requires further audiological assessment to determine the presence or absence of permanent hearing loss. Newborn hearing screening uses objective testing methods to screen the hearing of all newborns in a particular target region, regardless of the presence or absence of risk factors. Even among developed countries, until the 1990s, it could take years for hearing-impaired child to be diagnosed and to benefit from a health intervention and amplification. This delay still can happen in developing countries. If children are not exposed to sounds and language during their first years of life because of a hearing loss, they will have difficulty in developing spoken or signed language; cognitive development and social skills could also be affected. This screening separates children into two groups—those with a high index of suspicion and those with a low index of suspicion. Those in the first group are referred for diagnostic testing.
Canadian Hearing Services was founded in 1940 to provide services for deaf and hard of hearing people in Ontario. Services include instruction in American and Quebec sign languages, interpreter services, deafblind intervenors, audiology and speech–language pathology. The CHS advocates for the hearing impaired in Canada through the support of 9-1-1 texting, visual fire alarms, and access to the justice system. The CHS handles emergency situations in hospitals, emergency rooms, after-hours clinics, shelters, and police services.
The Boston Guild for the Hard of Hearing (BGHH) was founded in 1916 as the Speech Reader's Guild by Mildred Kennedy, Anna L. Staples, and Clara M. Ziegler, three teachers at the Mueller-Walle School of Lip Reading in Boston. Until its closure in 2003, the BGHH was the largest nonprofit organization in New England dedicated to serving the needs of people with hearing impairment. Although the BGHH closed, the Speech Audiology Department at Northeastern University continues the BGHH's mission to provide services to the hearing impaired.
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. 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. 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.
An audiologist, according to the American Academy of Audiology, "is a person who, by virtue of academic degree, clinical training, and license to practice and/or professional credential, is uniquely qualified to provide a comprehensive array of professional services related to the prevention of hearing loss and the audiologic identification, assessment, diagnosis, and treatment of persons with impairment of auditory and vestibular function, and to the prevention of impairments associated with them."
Audiology and hearing health professionals in India is made up of Indian healthcare professional that focus on audiological and hearing problems.
Quentin Summerfield is a British psychologist, specialising in hearing. He joined the Medical Research Council Institute of Hearing Research in 1977 and served as its deputy director from 1993 to 2004, before moving on to a chair in psychology at The University of York. He served as head of the Psychology department from 2011 to 2017 and retired in 2018, becoming an emeritus professor. From 2013 to 2018, he was a member of the University of York's Finance & Policy Committee. From 2015 to 2018, he was a member of York University's governing body, the Council.
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.
Richard Charles Dowell is an Australian audiologist, academic and researcher. He holds the Graeme Clark Chair in Audiology and Speech Science at University of Melbourne. He is a former director of Audiological Services at Royal Victorian Eye and Ear Hospital.
Canada is the largest country located in North America and is home to around 357,000 deaf and 3.21 million hard-of-hearing people. The country can be split into Francophone and Anglophone regions, and has both French and English as official languages. The majority of Canada is considered Anglophone and the province of Quebec along with small parts of New Brunswick, Ontario, and Manitoba are primarily French-speaking. The presence of these two main languages and cultures also brings forth different deaf cultures between the two regions. In Francophone regions, the official language used by deaf and hard-of-hearing people is Quebec Sign Language, or Langue des Signes Quebecoise (LSQ).
According to The Deaf Unit Cairo, there are approximately 1.2 million deaf and hard of hearing individuals in Egypt aged five and older. Deafness can be detected in certain cases at birth or throughout childhood in terms of communication delays and detecting language deprivation. The primary language used amongst the deaf population in Egypt is Egyptian Sign Language (ESL) and is widely used throughout the community in many environments such as schools, deaf organizations, etc. Ths article focuses on the many different aspects of Egyptian life and the impacts it has on the deaf community.
The Windward Islands consists of various islands located in the Caribbean Sea such as Dominica, Martinique, Barbados, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, and Grenada. It contains multiple cultures, beliefs, and languages.
