The hearing aid is a device designed to improve the quality of hearing and understanding the speech, addressed to people with hearing impairment. Hearing aids are used in medicine for years, but just recently reached a sophisticated level of the XXI century. Digitalisation has led to a big market breakthrough in hearing care and has definitely changed the approach to the concept of hearing aid. Hearing aid became a small but powerful empowering assistance in living life to the very fullest in the vivid world of sounds.
Hearing aids became a great support for patients with hearing loss. Depending on the level of loss and the audiogram curve’s characteristics, audiologist after taking into account patients requirements and aesthetic expectations selects the appropriate device. Then, the selected hearing aid is being programmed with a use of specialized aligning software.
IMPORTANT! Each hearing aid is individually programmed based on the audiometric curve to suit each patient’s needs.
How is a hearing aid built?
There are many kinds and models of hearing aids. Each is different and has different possibilities, but there are some fixed and unchangeable construction elements that can be called the fundamentals of hearing aids:
- microphone(s) — collects the sounds from the environment and converts them to the electrical signal and transfers it to the amplifier,
- amplifier – the heart of a hearing aid. In older (analog) hearing aids it used to only amplify the sound. In modern (digital) hearing aids, it is called a signal processor. It is designed to: recognize the sound, distinguish its levels, filter out unwanted sounds and strengthened them to get the best possible speech understanding,
- loudspeaker —miniature speaker which delivers sounds to the ear through the ear tip (BTE) or directly to the ear (ITE)
- housing — standard (BTE) or individually made (ITE)
- battery compartment — a place to insert the battery (including rechargeable) powering the whole system
- controllers (optional) — allowing the change of the listening modes or volume
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Author: Aleksandra Stojak