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Tinnitus

Definition

Tinnitus is the sensation of a ringing, roaring, clicking or buzzing sound in the ears even though no such external noise is present. It is usually intermittent.

Additional Info

A common cause of persistent tinnitus is chronic (long-term) exposure to loud noises. Tinnitus may also be caused by almost any abnormal ear condition or infection. Some cases are idiopathic, which means the underlying cause is not known or understood.

SDS Relevance

Hearing protection sign with electronic decibel meter

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Tinnitus is usually a symptom of an underlying problem. Always read your Safety Data Sheets so you know if tinnitus is a possible symptom of exposure to that chemical and take the appropriate precautions. Examples of SDS's that warn of tinnitus as possible symptoms of (over)exposure (along with other symptoms) include carbon dioxide, the anti-cancer drug cis-platin, and lithium bromide, to name a few.

If your workplace or occupation involves loud noises, you should always wear some sort of ear protection. Long-term exposure to even moderate noises can result in lasting hearing loss. Commercially available decibel meters and even devices such as the Apple Watch can help alert workers to noises which pose a threat to one's hearing.

Further Reading

See also: systemic.

Additional definitions from Google and OneLook.