In the world of dental magic, the noise levels can be, well, less than magical. The high-pitched whine of handpieces, the hiss of compressed air, vacuum systems, model trimmers, and the constant clatter of instruments and laboratory equipment can create surprisingly high noise levels Over time, this noise can take a toll on your hearing.
So, how do we know when noise becomes a hazard? Well, it all boils down to three things: how loud the sound is, how long the exposure lasts, and how often you're exposed.
So, what's the prescription? It starts with understanding the Occupational Safety and Health Administration’s (OSHA's) requirements for identifying workplace noise hazards and determining whether a Hearing Conservation Program is required. The OSHA standards that apply to hearing conservation include 1910.95, 1910.1020, and 1904.10.
29 CFR 1910.95: "The employer shall administer a continuing, effective hearing conservation program, as described in paragraphs (c) through (o) of this section, whenever employee noise exposures equal or exceed an 8-hour time-weighted average sound level (TWA) of 85 decibels measured on the A scale (slow response) or, equivalently, a dose of fifty percent. For purposes of the hearing conservation program, employee noise exposures shall be computed in accordance with appendix A and Table G-16a, and without regard to any attenuation provided by the use of personal protective equipment."
29 CFR 1910.1020: This standard provides requirements for access to employee exposure and medical records. 1910.1020(d)(1)(i) sets out the requirements for retention of medical records which could include any audiometric testing records. These medical records for each employee shall be preserved and maintained for at least the duration of employment plus thirty (30) years, except for some records as shown in this section.
29 CFR 1904.10: This standard provides that hearing loss that is work-related to be recorded on the Form 300. Of course, the employer must determine if the hearing loss is work-related. If an event or exposure in the work environment either caused or contributed to the hearing loss, or significantly aggravated a pre-existing hearing loss, the case should be considered to be work-related.
OSHA and NIOSH (the National Institute for Occupational Safety and Health) provide guidance on safe exposure levels. OSHA's Standard at 1910.95 states: "When information indicates that any employee's exposure may equal or exceed an 8-hour time-weighted average of 85 decibels, the employer shall develop and implement a monitoring program."
NIOSH recommends limiting worker exposure to 85 dBA as an 8-hour time-weighted average (TWA) to reduce the risk of occupational hearing loss. As a practical rule of thumb, at about 85 dBA you may need to raise your voice to communicate with someone standing about 3 feet away. At around 95 dBA, you will likely need to shout to be heard.
It's also important to distinguish between NIOSH's recommendation and OSHA's regulatory requirements. OSHA's Action Level is 85 dBA as an 8-hour TWA, which triggers the employer's Hearing Conservation Program requirements for affected employees. OSHA's Permissible Exposure Limit (PEL) is 90 dBA as an 8-hour TWA. Therefore, 85 dBA is not OSHA's maximum allowable exposure; it is the level at which hearing conservation measures, such as exposure monitoring, audiometric testing, training, and hearing protectors, become required for covered employees.
The consequences of neglecting your hearing can be significant. You depend on your ability to communicate effectively with co-workers and patients, and hearing loss can hinder this vital aspect of your work. Prolonged exposure to noise without proper protection can lead to irreversible damage, so it's essential for employers to take all necessary precautions and for employees to follow the employer's prevention methods.
Fortunately, there are a variety of effective ways to reduce employee noise exposure. Engineering controls may include purchasing quieter equipment, installing sound-dampening materials, enclosing noisy equipment, maintaining equipment to reduce unnecessary noise, or relocating particularly noisy processes away from routinely occupied work areas. Administrative steps like rotating employees away from noisy tasks, scheduling breaks and creating quiet rest areas can also help. And when all else fails, rock some stylish hearing protection devices like ear plugs or earmuffs. NIOSH provides some excellent information on how to choose the right hearing protector. Hearing protectors are available in a variety of styles, sizes, and materials. Selecting the right protector depends on the amount of noise reduction needed, the work being performed, and what employees will wear consistently and correctly.
Employers, by protecting your employees' ears, you're investing in their long and harmonious career. So, remember, when it comes to noise, don't turn a deaf ear – protect it instead! Your employees will thank you. Now, go out there and be the hero of dental health, protecting both smiles and your employees' precious hearing with the power of ear protection!
Remember, friends, noise-induced hearing loss can happen to anyone in any industry, but with a bit of wit and wisdom, we can all keep our ears happy and healthy.
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