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Audiology (from
Latin Latin (, or , ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through ...
, "to hear"; and from
Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...
, ''
-logia ''-logy'' is a suffix in the English language, used with words originally adapted from Ancient Greek ending in ('). The earliest English examples were anglicizations of the French '' -logie'', which was in turn inherited from the Latin '' -lo ...
'') 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 (e.g. behavioral
hearing test A hearing test provides an evaluation of the sensitivity of a person's sense of hearing and is most often performed by an audiologist using an audiometer. An audiometer is used to determine a person's hearing sensitivity at different frequenci ...
s, otoacoustic emission measurements, and electrophysiologic tests), audiologists aim to determine whether someone has normal sensitivity to sounds. If hearing loss is identified, audiologists determine which portions of hearing (high, middle, or low
frequencies Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as ''temporal frequency'' for clarity, and is distinct from ''angular frequency''. Frequency is measured in hertz (Hz) which is eq ...
) are affected, to what degree (severity of loss), and where the lesion causing the hearing loss is found (
outer ear The outer ear, external ear, or auris externa is the external part of the ear, which consists of the auricle (also pinna) and the ear canal. It gathers sound energy and focuses it on the eardrum (tympanic membrane). Structure Auricle The ...
,
middle ear The middle ear is the portion of the ear medial to the eardrum, and distal to the oval window of the cochlea (of the inner ear). The mammalian middle ear contains three ossicles, which transfer the vibrations of the eardrum into waves in the ...
,
inner ear The inner ear (internal ear, auris interna) is the innermost part of the vertebrate ear. In vertebrates, the inner ear is mainly responsible for sound detection and balance. In mammals, it consists of the bony labyrinth, a hollow cavity in the ...
,
auditory nerve The cochlear nerve (also auditory nerve or acoustic nerve) is one of two parts of the vestibulocochlear nerve, a cranial nerve present in amniotes, the other part being the vestibular nerve. The cochlear nerve carries auditory sensory information ...
and/or
central nervous system The central nervous system (CNS) is the part of the nervous system consisting primarily of the brain and spinal cord. The CNS is so named because the brain integrates the received information and coordinates and influences the activity of all pa ...
). If an audiologist determines that a
hearing loss 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 ...
or vestibular abnormality is present, they will provide recommendations for interventions or rehabilitation (e.g.
hearing aid A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. Hearing aids are classified as medical devices in most countries, and regulated by the respective regulations. Small audio amplifiers su ...
s,
cochlear implant 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 unde ...
s, appropriate medical referrals). In addition to diagnosing audiologic and vestibular pathologies, audiologists can also specialize in rehabilitation of
tinnitus Tinnitus is the perception of sound when no corresponding external sound is present. Nearly everyone experiences a faint "normal tinnitus" in a completely quiet room; but it is of concern only if it is bothersome, interferes with normal hearin ...
,
hyperacusis Hyperacusis is the increased sensitivity to sound and a low tolerance for environmental noise. Definitions of hyperacusis can vary significantly; it can refer to normal noises being perceived as: loud, annoying, painful, fear-inducing, or a combina ...
, misophonia,
auditory processing disorder Auditory processing disorder (APD), rarely known as King-Kopetzky syndrome or auditory disability with normal hearing (ADN), is a neurodevelopmental disorder affecting the way the brain processes auditory information. Individuals with APD usually ...
s,
cochlear implant 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 unde ...
use and/or
hearing aid A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. Hearing aids are classified as medical devices in most countries, and regulated by the respective regulations. Small audio amplifiers su ...
use. Audiologists can provide hearing health care from birth to end-of-life.


Audiologist

An audiologist is a health-care professional specializing in identifying, diagnosing, treating, and monitoring disorders of the auditory and
vestibular system The vestibular system, in vertebrates, is a sensory system that creates the sense of balance and spatial orientation for the purpose of coordinating movement with balance. Together with the cochlea, a part of the auditory system, it constitut ...
s. Audiologists are trained to diagnose, manage and/or treat hearing,
tinnitus Tinnitus is the perception of sound when no corresponding external sound is present. Nearly everyone experiences a faint "normal tinnitus" in a completely quiet room; but it is of concern only if it is bothersome, interferes with normal hearin ...
, or balance problems. They dispense, manage, and rehabilitate
hearing aids A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. Hearing aids are classified as medical devices in most countries, and regulated by the respective regulations. Small audio amplifiers su ...
and assess candidacy for and map hearing implants, such as
cochlear implant 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 unde ...
s, middle ear implants and bone conduction implants. They counsel families through a new diagnosis of hearing loss in infants, and help teach coping and compensation skills to late-deafened adults. They also help design and implement personal and industrial hearing safety programs, newborn hearing screening programs, school hearing screening programs, and provide special or custom fitted ear plugs and other hearing protection devices to help prevent hearing loss. Audiologists are trained to evaluate peripheral vestibular disorders originating from pathologies of the vestibular portion of the
inner ear The inner ear (internal ear, auris interna) is the innermost part of the vertebrate ear. In vertebrates, the inner ear is mainly responsible for sound detection and balance. In mammals, it consists of the bony labyrinth, a hollow cavity in the ...
. They also provide treatment for certain vestibular and balance disorders such as Benign Paroxysmal Positional Vertigo (BPPV). In addition, many audiologists work as auditory or acoustic scientists in a research capacity. Audiologists are trained in anatomy and physiology, hearing aids, cochlear implants, electrophysiology, acoustics, psychophysics and psychoacoustics, neurology, vestibular function and assessment, balance disorders, counseling and communication options such as sign language. Audiologists may also run a neonatal hearing screening program which has been made compulsory in many hospitals in US, UK and India. An audiologist usually graduates with one of the following qualifications: BSc, MSc(Audiology), AuD, STI, PhD, or ScD, depending the program and country attended. In 2018, a report by CareerCast found the occupation of audiologist to be the third least stressful job surveyed.


History

The use of the terms ''audiology'' and ''audiologist'' in publications has been traced back only as far as 1946. The creator of the term remains unknown, but Berger identified possible originators as Mayer BA Schier, Willard B Hargrave, Stanley Nowak, Norman Canfield, or Raymond Carhart. In a biographical profile by Robert Galambos,
Hallowell Davis Hallowell Davis (August 31, 1896 – August 22, 1992) was an American physiologist, otolaryngologist and researcher who did pioneering work on the physiology of hearing and the inner ear. He served as director of research at the Central Institu ...
is credited with coining the term in the 1940s, saying the then-prevalent term "auricular training" sounded like a method of teaching people how to wiggle their ears. the first US university course for audiologists was offered by Carhart at
Northwestern University Northwestern University is a private research university in Evanston, Illinois. Founded in 1851, Northwestern is the oldest chartered university in Illinois and is ranked among the most prestigious academic institutions in the world. Chart ...
, in 1946. Audiology was born of interdisciplinary collaboration. The substantial prevalence of
hearing loss 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 ...
observed in the veteran population after World War II inspired the creation of the field as it is known today. The International Society of Audiology (ISA) was founded in 1952 to "…facilitate the knowledge, protection and rehabilitation of human hearing" and to "…serve as an advocate for the profession and for the hearing impaired throughout the world." It promotes interactions among national societies, associations and organizations that have similar missions, through the organization of a biannual world congresses, through the publication of the scientific peer-reviewed International Journal of Audiology and by offering support to the
World Health Organization The World Health Organization (WHO) is a specialized agency of the United Nations responsible for international public health. The WHO Constitution states its main objective as "the attainment by all peoples of the highest possible level of ...
's efforts towards addressing the needs of the hearing impaired and deaf community.


Requirements


Australia

In Australia Audiologists must hold a Master of Audiology, Master of Clinical Audiology, Master of Audiology Studies or alternatively a bachelor's degree from overseas certified by the private agency Vocational Education, Training and Assessment Services (VETASSESS). Although audiologists in Australia are not required to be a member of any professional body, audiology graduates can undergo a clinical training program or internship leading to accreditation with Audiology Australia (AudA) or the Australian College of Audiology (ACAud) which involves supervised practice and professional development, and typically lasts one year. To provide rehabilitative services to eligible pensioners, war veterans, and children and young adults under the age of 26 as part of the Hearing Services Program, an audiologist must hold a qualified practitioner (QP) number which can be sought by first obtaining accreditation.


Brazil

In
Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...
, audiology training is part of speech pathology and audiology undergraduate, four-year courses. The University of São Paulo was the first university to offer a bachelor's degree, and it started operations in 1977. At the federal level, the recognition of the educational programs and the profession of speech pathologist and audiologist took place on December 9, 1981, signed by President João Figueiredo (law no. 6965). The terms  ''audiology'' and  ''audiologist'' can be tracked in Brazilian publications since 1946. The work of audiologists in Brazil was described in 2007.


Canada

In Canada, a masters of science (MSc) is the minimum requirement to practice audiology in the country. The profession is regulated in New Brunswick, Quebec, Ontario, Manitoba, Saskatchewan, Alberta, and British Columbia, where it is illegal to practice without being registered as a full member in the appropriate provincial regulatory body.


Bangladesh

A BSc (Hons) in audiology and speech language pathology is required.


India

To practice audiology, professionals need to have either a bachelor's or a master's degree in audiology and be registered with Rehabilitation Council of India (RCI).


Malaysia

Three Malaysian educational institutions offer degrees in audiology.


United Kingdom

There are currently five routes to becoming a registered audiologist: * FdSc in hearing aid audiology * BSc in audiology * MSc in audiology * Fast-track conversion Diploma for those with a BSc in another relevant science subject, available at Southampton, Manchester, UCL, London, and Edinburgh * BSc(Hons) in clinical physiology (audiology) available at
Glasgow Caledonian University Glasgow Caledonian University ( gd, Oilthigh Chailleannach Ghlaschu, ), informally GCU, Caledonian or Caley, is a public university in Glasgow, Scotland. It was formed in 1993 by the merger of The Queen's College, Glasgow (founded in 1875) and G ...
(all applicants must be NHS employees)


United States

In the United States, audiologists are regulated by state licensure or registration in all 50 states and the District of Columbia. Starting in 2007, the doctor of audiology (AuD) became the entry-level degree for clinical practice for some states, with most states expected to follow this requirement very soon, as there are no longer any professional programs in audiology which offer the master's degree. Minimum requirements for the AuD degree include a minimum of 75 semester hours of post-baccalaureate study, meeting prescribed competencies, passing a national exam offered by Praxis Series of the Educational Testing Service, and practicum experience that is equivalent to a minimum of 12 months of full-time, supervised experience. Most states have continuing education renewal requirements that must be met to stay licensed. Audiologists can also earn a certificate from the American Speech-Language-Hearing Association or seek board certification through the American Board of Audiology (ABA). Currently, there are over 70 AuD programs in the United States. In the past, audiologists have typically held a master's degree and the appropriate healthcare license. However, in the 1990s the profession began to transition to a doctoral level as a minimum requirement. In the United States, starting in 2007, audiologists were required to receive a doctoral degree ( AuD or PhD) in audiology from an accredited university graduate or professional program before practicing. All states require licensing, and audiologists may also carry national board certification from the American Board of Audiology or a certificate of clinical competence in audiology (CCC-A) from the American Speech-Language-Hearing Association.


Pakistan

In Pakistan, a master's or doctoral degree in audiology is required to practice this profession. This medical degree must come from a recognised institute, most of which are government, otherwise the person didn't get the license to practice the audiology. Pakistan Medical and Dental Council (PMDC) issues the practicing license to all the medical students. Besides these, the person who provides the medical instruments to these doctors should also have the certificate of accreditation, issued by the Pakistan National Accreditation Council (PNAC).


Portugal

The exercise of audiologist profession in Portugal necessarily imply the qualifications degree in audiology or legally equivalent as defined in Decree-Law 320/99 of August 11 Article 4.


South Africa

In South Africa, there are currently five institutions offering training in audiology. The institutions offer different qualifications that make one eligible for practicing audiology in South Africa. The qualifications are as follows, I) B. Audiology, II) BSc. Audiology, III) B. Communication Pathology (Audiology), and IV) B. Speech Language Pathology and Audiology (BSLP&A). All practicing audiologists are required to be registered with the Health Professional Council of South Africa (HPCSA).


See also

* Audiology and hearing health professionals in developed and developing countries *
Auditory brainstem response The auditory brainstem response (ABR), also called brainstem evoked response audiometry (BERA), is an auditory evoked potential extracted from ongoing electrical activity in the brain and recorded via electrodes placed on the scalp. The measured r ...
(ABR) *
Auditory agnosia Auditory agnosia is a form of agnosia that manifests itself primarily in the inability to recognize or differentiate between sounds. It is not a defect of the ear or "hearing", but rather a neurological inability of the brain to process sound meani ...
*
Auditory processing disorder Auditory processing disorder (APD), rarely known as King-Kopetzky syndrome or auditory disability with normal hearing (ADN), is a neurodevelopmental disorder affecting the way the brain processes auditory information. Individuals with APD usually ...
*
Auditory verbal agnosia Auditory verbal agnosia (AVA), also known as pure word deafness, is the inability to comprehend speech. Individuals with this disorder lose the ability to understand language, repeat words, and write from dictation. Some patients with AVA describe ...
* Audiometrist *
Audiometry Audiometry () is a branch of audiology and the science of measuring hearing acuity for variations in sound intensity and pitch and for tonal purity, involving thresholds and differing frequencies. Typically, audiometric tests determine a subj ...
*
Balance disorder A balance disorder is a disturbance that causes an individual to feel unsteady, for example when standing or walking. It may be accompanied by feelings of giddiness, or wooziness, or having a sensation of movement, spinning, or floating. Balance ...
*
Bone anchored hearing aid A bone-anchored hearing aid (BAHA) is a type of hearing aid based on bone conduction. It is primarily suited for people who have conductive hearing losses, unilateral hearing loss, single-sided deafness and people with mixed hearing losses who c ...
(BAHA) *
Cochlear implant 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 unde ...
* Computational audiology * Dichotic listening test *
Earplug An earplug is a device that is inserted in the ear canal to protect the user's ears from loud noises, intrusion of water, foreign bodies, dust or excessive wind. Since they reduce the sound volume, earplugs are often used to help prevent hearin ...
*
Electronystagmography Electronystagmography (ENG) is a diagnostic test to record involuntary movements of the eye caused by a condition known as nystagmus. It can also be used to diagnose the cause of vertigo, dizziness or balance dysfunction by testing the vestibula ...
(ENG/VNG) * European Federation of Audiology Societies *
Hearing Aid A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. Hearing aids are classified as medical devices in most countries, and regulated by the respective regulations. Small audio amplifiers su ...
*
Hearing impairment 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 ...
* Listening * Noise induced hearing loss *
Otoacoustic emission An otoacoustic emission (OAE) is a sound that is generated from within the inner ear. Having been predicted by Austrian astrophysicist Thomas Gold in 1948, its existence was first demonstrated experimentally by British physicist David Kemp in 1978 ...
s *
Otolaryngology Otorhinolaryngology ( , abbreviated ORL and also known as otolaryngology, otolaryngology–head and neck surgery (ORL–H&N or OHNS), or ear, nose, and throat (ENT)) is a surgical subspeciality within medicine that deals with the surgical a ...
*
Otology Otology is a branch of medicine which studies normal and pathological anatomy and physiology of the ear (hearing and vestibular sensory systems and related structures and functions) as well as their diseases, diagnosis and treatment. Otologic ...
*
Speech and language pathology Speech is a human vocal communication using language. Each language uses phonetic combinations of vowel and consonant sounds that form the sound of its words (that is, all English words sound different from all French words, even if they are th ...
* Spatial hearing loss *
Tympanometry Tympanometry is an acoustic evaluation of the condition of the middle ear eardrum (tympanic membrane) and the conduction bones by creating variations of air pressure in the ear canal. Tympanometry is an objective test of middle-ear function. It is ...


References


External links

{{Authority control Otology Rehabilitation team Auditory system Acoustics Sound sv:Audionom th:นักโสตสัมผัสวิทยา