Hearing loss among children is on the rise.
The steady increase of day-to-day noise levels in the past 30 years has also been accompanied by an increase in noise-induced hearing-loss (NIHL). Awareness of hazardous sound levels and the use of hearing protection can prevent NIHL.
Widespread Problem
The National Institute on Deafness and Other Communication Disorders (NIDCD) estimates that in the U.S., of the 28 million people suffering from some form of hearing loss, at least 1/3 can be partially attributed to NIHL.
Hazardous Noise Levels
Sound levels are generally measured in decibels (dB). A whisper is 30 dB and conversation is 60 dB. The risk of NIHL can begin from prolonged exposure to sounds above 80 dB (an alarm clock or a busy street). At this level it is suggested that hearing protection is utilized.
Inner Ear Damage
The cochlea, an organ located in the inner ear, is covered in thousands of hair-like cells that transmit sound vibrations to the auditory nerve. Exposure to hazardous sound levels can damage these hair-like cells, resulting in NIHL.
Noise Hazards
Awareness of the risk of NIHL from occupational sources, such as power tools, and certain recreational sources, such as firearms, has become more commonplace. However, exposure to the sound levels of stereo headphones (105 dB) and amplified music (120 dB to 150 dB) pose a significant risk.
Protect Yourself
Use hearing protection such as earplugs or earmuffs during prolonged exposure to hazardous noise levels at work or home. If possible, lower volume levels of entertainment devices--especially those with stereo headphones or in confined spaces, such as vehicles.
Tags: hearing protection, sound levels, hair-like cells, hazardous sound, hazardous sound levels
