FM systems can enhance the use of hearing aids and overcome the effects of poor listening conditions because the signal is sent from the microphone worn by the speaker directly to the listener. The prognosis has improved with the recent advancements in digital hearing aid technology, such as directional microphones, open-fit hearing aids, and more advanced algorithms. Hearing aids can mask or cover up the tinnitus, and many with hearing loss and tinnitus find relief by using hearing aids. Though there is no cure or agreed-upon treatment for tinnitus, some drugs have been shown to provide temporary reduction of tinnitus. Other treatments for tinnitus include cognitive-behavioral therapy, biofeedback, and electrical stimulation. Annual audiological evaluations are recommended to monitor any changes in a patients hearing and to modify hearing-aid prescriptions. A systematic-review conducted by the American Academy of Audiology Task Force On the Health-Related Quality of Life Benefits of Amplification in Adults found the use of hearing aids to increase quality of life. The review pertained to adults who experienced sensorineural hearing loss, which can be caused by excessive, loud noise. Epidemiology
The World Health Organization estimates that nearly 360 million people have moderate to profound hearing loss from all causes. Rates of hearing loss has traditionally been attributed to occupational or firearm-related exposure, as well as recreational exposure. The World Health Organization estimated in 2015 that 1.1 billion young people are at risk for hearing loss caused by unsafe listening practices.
Subdural effusion refers to an effusion in the subdural space, usually of cerebrospinal fluid.It is sometimes treated with surgery. See also
Cerebrospinal fluid leak

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