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Otorhinolaryngology, audiology. Noise-induced hearing loss (NIHL) is a hearing impairment resulting from exposure to loud sound. People may have a loss of perception of a narrow range of frequencies or impaired perception of sound including sensitivity to sound or ringing in the ears. [ 1 ] When exposure to hazards such as noise occur at work ...
With Frequency Modulation (FM) systems, the sound is transmitted on a specific frequency or channel similar to a radio. The Federal Communications Commission (FCC) has designated specific frequencies for these types of systems. There are now small receivers than can be connected directly to a person's hearing aids through Direct Audio Input ...
An audiogram is the result of a hearing test. The most common type of hearing test is pure tone audiometry (PTA). It charts the thresholds of hearing sensitivity at a selection of standard frequencies between 250 and 8000 Hz. There is also high frequency pure tone audiometry which tests frequencies from 8000 to 20,000 Hz.
The hearing aid is fitted to the most recent audiogramand is programmed by frequency. This process called "fitting" can be performed by the user in simple cases, by a Doctor of Audiology, also called an audiologist (AuD), or by a Hearing Instrument Specialist (HIS) or audioprosthologist.
Elevated workplace or environmental noise can cause hearing impairment, tinnitus, hypertension, ischemic heart disease, annoyance, and sleep disturbance. [3][4] Changes in the immune system and birth defects have been also attributed to noise exposure. [5] Although age-related health effects (presbycusis) occur naturally with age, [6] in many ...
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 [ 1 ][ 2 ] and thus providing a basis for diagnosis and management. Pure-tone audiometry is a subjective, behavioural measurement of a hearing threshold, as it ...
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