It’s popular to think of hearing loss as an inescapable problem connected with aging, or, more recently, as a consequence of the younger generation’s constant use of iPods. But the numbers show that the larger problem may be exposure to loud noise at work.
In the US, 22 million workers are subjected to potentially hazardous noise, and an estimated 242 million dollars is paid on a yearly basis on worker’s compensation claims for hearing loss, according to the National Institute for Occupational Safety and Health (NIOSH).
What’s more is that higher rates of hearing loss are found in increasingly noisier occupations, indicating that being exposed to sounds above a certain level progressively enhances your risk for developing noise-induced hearing loss later in life.
How loud is too loud?
A study carried out by Audicus found that, of those who were not subjected to work-related noise levels over 90 decibels, only 9 percent experienced noise-induced hearing loss at age 50. In contrast, construction workers, who are repeatedly subjected to sound levels as high as 120 decibels, suffered with noise-induced hearing loss at the age of 50 at a rate of 60 percent!
It appears that 85-90 decibels is the threshold for safe sound levels, but that’s not the complete story: the decibel scale is logarithmic, not linear. That signifies that as you raise the decibel level by 3 decibels, the sound level approximately doubles. So 160 decibels is not two times as loud as 80—it’s about 26 times louder!
Here’s how it breaks down: a decibel level of 0 is scarcely noticeable, normal conversation is about 60 decibels, the limit for safety is 85-90 decibels, and the death of hearing cells occurs at 180 decibels. It’s the region between 85 and 180 that leads to noise-induced hearing loss, and as would be expected, the vocations with increasingly louder decibel levels have steadily higher rates of hearing loss.
Hearing loss by occupation
As the following table displays, as the decibel levels associated with each profession increase, hearing loss rates increase as well:
|Occupation||Decibel level||Incidence rates of hearing loss at age 50|
|No noise exposure||Less than 90 decibels||9%|
Any profession with decibel levels above 90 places its personnel at risk for hearing loss, and this includes rock musicians (110 dB), nightclub staff (110 dB), Formula One drivers (135 dB), airport ground staff (140 dB), and shooting range marshalls (140 dB). In every scenario, as the decibel level rises, the risk of noise-induced hearing loss rises with it.
Protecting your hearing
A recent US study on the prevalence of hearing loss in farming revealed that 92 percent of the US farmers surveyed were exposed to harmful noise levels, but that only 44 percent reported to use hearing protection devices on a regular basis. Factory workers, in comparison, tend to stick to to stricter hearing protection regulations, which may explain why the incidence rate of hearing loss is moderately lower in manufacturing than it is in farming, despite being exposed to similar decibel volumes.
All of the data point to one thing: the importance of protecting your hearing. If you work in a high-risk occupation, you need to take the right precautionary steps. If avoiding the noise is not an option, you need to find ways to minimize the noise levels (best attained with custom earplugs), in addition to assuring that you take frequent rest breaks for your ears. Reducing both the sound volume and exposure time will lower your chances of acquiring noise-induced hearing loss.
If you would like to investigate a hearing protection plan for your specific circumstances or job, give us a call. As hearing specialists, we can provide personalized solutions to best protect your hearing at work. We also offer custom earplugs that, in addition to defending your hearing, are comfortable to wear and can maintain the natural quality of sound (as opposed to the muffled sound you hear with foam earplugs).