Audiology (from Latin audīre, "to hear"; and from Greek -λογία, -logia) is a branch of science that studies hearing, balance, and related disorders.[1] Audiologists treat those with hearing loss and proactively prevent related damage. By employing various testing strategies (e.g. behavioral hearing tests, 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) are affected, to what degree (severity of loss), and where the lesion causing the hearing loss is found (outer ear, middle ear, inner ear, auditory nerve and/or central nervous system). If an audiologist determines that a hearing loss or vestibular abnormality is present he or she will provide recommendations for interventions or rehabilitation (e.g. hearing aids, cochlear implants, appropriate medical referrals).

Image showing an audiologist testing the hearing of a patient inside a hearing booth and using an audiometer
Audiological Exam

In addition to diagnosing audiologic and vestibular pathologies, audiologists can also specialize in rehabilitation of tinnitus, hyperacusis, misophonia, auditory processing disorders, cochlear implant use and/or hearing aid use. Audiologists can provide hearing health care from birth to end-of-life.


An audiologist is a health-care professional specializing in identifying, diagnosing, treating, and monitoring disorders of the auditory and vestibular systems. Audiologists are trained to diagnose, manage and/or treat hearing, tinnitus, or balance problems. They dispense, manage, and rehabilitate hearing aids and assess candidacy for and map cochlear 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,[2] 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. 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), Au.D., STI, PhD, or ScD, depending the program and country attended.


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[3] 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 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.[4] the first US university course for audiologists was offered by Carhart at Northwestern University, in 1946.[5]

Audiology was born of interdisciplinary collaboration. The substantial prevalence of hearing loss 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[6] and by offering support to the World Health Organization's efforts towards addressing the needs of the hearing impaired and deaf community.



In Australia Audiologists must hold a Master of Audiology, Master of Clinical Audiology or Master of Audiology Studies or alternatively a bachelor's degree from overseas certified by the VETASSESS.


In Brazil, 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 the then President João Figueiredo (Law n ° 6965). The terms  "audiology " and  "audiologist " can be tracked in Brazilian publications since 1946. The work of Audiologists in Brazil was described in 2007.[7]


In Canada, a Masters of Science (M.Sc.) is the minimum requirement to practice Audiology in the country. The profession is regulated in certain provinces: 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.[8]


A BSc (Hons) in Audiology and Speech Language Pathology is required.


To practice audiology, professionals need to have either Bachelors/Master's degree in Audiology and be registered with Rehabilitation Council of India (RCI).


Three Malaysian educational institutions offer degrees in Audiology.

United KingdomEdit

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. All applicants must be NHS employees.

United StatesEdit

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 (Au.D.) 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 Au.D. 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 Au.D. 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 minimal requirement. In the United States, starting in 2007, audiologists were required to receive a doctoral degree (Au.D. or Ph.D.) in audiology from an accredited university graduate or professional program before practicing.[9] 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.


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.

See alsoEdit


  1. ^ Gelfand, Stanley A. (2009). Essentials of Audiology (3 ed.). New York: Thieme Medical Publishers, Inc. p. ix. ISBN 978-1-60406-044-7. Retrieved 17 March 2015.
  2. ^ "Your Baby's Hearing Screening". NIDCD. 2017-06-19. Retrieved 2019-02-14.
  3. ^ Berger, KW (1976). "Genealogy of the words "audiology" and "audiologist"". Journal of the American Audiology Society. 2 (2): 38–44. PMID 789309.
  4. ^ "Hallowell Davis (1896—1992)" (PDF). A Biographical Memoir by Robert Galambos (National Academy of Sciences). Retrieved July 17, 2010.
  5. ^ Raymond Carhart (1912-1975) Papers, 1938-1975. Northwestern University Archives, Evanston, Illinois. Accessed 2006-07-31.
  6. ^ Bamford, John (10 December 2001). "Editorial -Sound, British Journal of Audiology, International Journal of Audiology". British Journal of Audiology. 35 (6): 327–328. doi:10.1080/00305364.2001.11745250. ISSN 0300-5364. S2CID 78271611.[verification needed]
  7. ^ Bevilacqua, Maria Cecilia; Novaes, Beatriz Caiuby; Morata, Thais C. (2008-01-01). "Audiology in Brazil". International Journal of Audiology. 47 (2): 45–50. doi:10.1080/14992020701770843. ISSN 1499-2027. PMID 18236235. S2CID 36199642.
  8. ^ "CICIC::Information for foreign-trained audiologists and speech-language pathologists". Occupational profiles for selected trades and professions.
  9. ^ "AuD Facts | Audiology". 2014-06-05. Retrieved 2016-09-18.

External linksEdit