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Hearing loss due to noise is the second most common sensorineural hearing loss, after age-related hearing loss (presbycusis). Of more than 28 million Americans with some degree of hearing impairment, as many as 10 million have hearing loss caused by in part by excessive noise exposure in the workplace or during recreational activities. [13]
Here's what to do if you hit your head really hard, have a concussion, and what to do if you think you have a concussion.
It may seem like a good idea, but doing it could seriously jeopardize your health.
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Profound unilateral hearing loss is a specific type of hearing loss when one ear has no functional hearing ability (91 dB or greater hearing loss). People with profound unilateral hearing loss can only hear in monaural (mono). Profound unilateral hearing loss or single-sided deafness, SSD, makes hearing comprehension very difficult.
Second-impact syndrome (SIS) occurs when the brain swells rapidly, and catastrophically, after a person has a second concussion before symptoms from an earlier one have subsided. This second blow may occur minutes, days, or weeks after an initial concussion, [ 1 ] and even the mildest grade of concussion can lead to second impact syndrome. [ 2 ]
Hearing loss that worsens with age but is caused by factors other than normal aging, such as noise-induced hearing loss, is not presbycusis, although differentiating the individual effects of multiple causes of hearing loss can be difficult. One in three persons have significant hearing loss by age 65; by age 75, one in two.
Auditory fatigue is defined as a temporary loss of hearing after exposure to sound. This results in a temporary shift of the auditory threshold known as a temporary threshold shift (TTS). The damage can become permanent ( permanent threshold shift , PTS) if sufficient recovery time is not allowed before continued sound exposure. [ 1 ]