what is it caused by?
Prolonged exposure to loud sound or noise levels can lead to tinnitus.
Tinnitus
Prolonged exposure to loud sound or noise levels can lead to tinnitus. 
where is the smallest bone in the human body found In the middle ear what is it's structure? It  is the third bone of the three ossicles in the middle ear. The stapes is a stirrup-shaped bone. what is it's role in the body? It  transmits sound vibrations from the incus to the oval window what other bones can be found in the ear? malleus, incus can this part of the body get infected? Yes, The ear may be affected by disease, including infection and traumatic damage. Diseases of the ear may lead to hearing loss, tinnitus and balance disorders what is the second mentioned disease about? Tinnitus is the perception of sound when no corresponding external sound is present. While often described as a ringing, it may also sound like a clicking, buzzing, hiss, or roaring. how can someone lose hearing? Hearing loss may have many different causes, but among those with tinnitus, the major cause is cochlear injury. what part does the organ play in other animals? In some animals with mobile pinnae (like the horse), each pinna can be aimed independently to better receive the sound. For these animals, the pinnae help localise the direction of the sound source. how is the aforementioned disease diagnosed? Typically an audiogram is done, and occasionally medical imaging or electronystagmography. what symptoms does it show? It often is described as a ringing noise, but in some people, it takes the form of a high-pitched whining, electric buzzing in ears. what different types of it can be seen? "subjective and objective tinnitus" what does the former mean? The sounds the person hears are not detectable by means currently available to physicians and hearing technicians. Subjective tinnitus has also been called "tinnitus aurium", "non-auditory" or "non-vibratory" tinnitus. can it be prevented from happening? Custom made ear plugs or other measures can help with prevention.
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Tinnitus [SEP] Prevention
Prolonged exposure to loud sound or noise levels can lead to tinnitus. Custom made ear plugs or other measures can help with prevention. Employers may use hearing loss prevention programs to help educate and prevent dangerous levels of exposure to noise. Groups like NIOSH and OSHA help set regulations to ensure employees, if following the protocol, should have minimal risk to permanent damage to their hearing. Several medicines have ototoxic effects, and can have a cumulative effect that can increase the damage done by noise. If ototoxic medications must be administered, close attention by the physician to prescription details, such as dose and dosage interval, can reduce the damage done.