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Approximately 40 million Americans suffer from Noise Induced Hearing Loss (NIHL). NIHL is caused by a one-time exposure to loud sound (85+ decibels for 8hrs) as well as by repeated exposure to various levels over an extended time! | Listening to music on earphones/earbuds, at mid level (approx. 100 decibels) can cause damage after just 15 minutes per day! | Sounds travels at a speed of 1125 feet per second, or 768 miles per hour. | The decibel of a pin drop is 10 decibels. |