II. Types: Conventional analog Hearing Aids

  1. Cost: ~$900 per ear
  2. Components
    1. Battery
    2. Microphone transduces sound into electrical energy
    3. Receiver changes electrical energy into sound
    4. Most Hearing Aids can adjust volume
      1. May be a problem with background noise
  3. Sub-Types
    1. Linear (Simple Hearing Aid)
      1. Amplifies loud and soft sounds equally
    2. Non-Linear
      1. Varied amplification for loud and soft sounds
      2. Decreased recruitment (increased loudness)

III. Types: Programmable Hearing Aids

  1. Programmable by audiologist
  2. Sound levels adjustable for audibility and comfort
  3. Some available with multiple programs
    1. (e.g. telephone, music)

IV. Types: Digital Hearing Aids

  1. Cost: ~$2900 per ear
  2. Digital signal processor samples incoming signals
  3. Adjusts in different sound environs
    1. Can reduce background noise from non-speech source
    2. Enhances speech understanding
  4. Programmable by audiologist

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Ontology: Hearing Aids (C0018768)

Definition (MEDLINEPLUS)

A hearing aid is a small electronic device that you wear in or behind your ear. It makes some sounds louder. A hearing aid can help people hear more in both quiet and noisy situations.

Hearing aids help people who have hearing loss from damage to the small sensory cells in the inner ear. The damage can occur as a result of disease, aging, or injury from noise or certain medicines. Only about one out of five people who would benefit from a hearing aid actually uses one. If you think a hearing aid could help you, visit your doctor.

There are different kinds of hearing aids. They differ by size, their placement on or inside the ear, and how much they amplify sound. The hearing aid that will work best for you depends on what kind of hearing loss you have, and how severe it is.

NIH: National Institute on Deafness and Other Communication Disorders

Definition (MSH) Wearable sound-amplifying devices that are intended to compensate for impaired hearing. These generic devices include air-conduction hearing aids and bone-conduction hearing aids. (UMDNS, 1999)
Definition (CSP) wearable sound-amplifying devices that are intended to compensate for impaired hearing; devices include air-conduction hearing aids and bone-conduction hearing aids.
Concepts Medical Device (T074)
MSH D006310
SnomedCT 6012004
English Aid, Hearing, Aids, Hearing, Hearing Aids, Hearing Aid, Hearing aid, device, hearing aid (treatment), hearing services hearing aid, hearing aid, hearing aids, hearing aids [device], Hearing aids, Hearing aid, HA - Hearing aid, Hearing aid, device (physical object)
Swedish Hörhjälpmedel
Czech sluchové pomůcky
Finnish Kuulokojeet
Russian SLUKHOVYE APPARATY, СЛУХОВЫЕ АППАРАТЫ
French Appareils auditifs, Appareils de correction auditive, Dispositifs auditifs, Aides à l'audition, Dispositifs de correction auditive, Aides auditives
Croatian SLUŠNA POMAGALA
Polish Aparaty słuchowe
Italian Dispositivi acustici, Dispositivi uditivi, Apparecchi acustici
Norwegian Hørselshjelpemidler, Høreapparater
Portuguese Fones de ouvido, Aparelhos Auditivos, Auxiliares de Audição
Spanish audífono (objeto físico), audífono, Audífonos
German Hörhilfen
Dutch Apparaat, gehoor-, Gehoorapparaat, Gehoorapparaten