Is a higher NRR rating always better for employees?

Thalia Whitney • September 4, 2025

When choosing hearing protection for employees, it may seem like the higher level of protection is the best option. However, it’s important to make sure employees will receive the appropriate level of protection based on the noise exposure of their job. 

Read more: things to consider when choosing HPDs


What is an NRR?


NRR stands for Noise Reduction Rating, and is a measurement of the protection an employee would receive while wearing the hearing protection. As it is a laboratory estimate and assumes the protection is always worn correctly, it is often found to be overly optimistic. Real attenuation is usually much lower than the NRR, which is why OSHA and NIOSH recommend derating the NRR to get a better idea of the protection level.


Interested in how much protection your employees really receive? Consider fit testing


A higher NRR isn’t always the best choice


When deciding what the NRR ‘sweet spot’ is, it’s helpful to consider driving on a sunny day. It wouldn’t be safe to drive with welding goggles because they block more light than sunglasses. You would be overprotected, and unable to see and react to potential issues.


The same principle applies to hearing protection. When employees are working in the 80-100 decibel range, hearing protection is a must. But an NRR that’s too high can block out important danger signals or verbal communications.


Dangers of too little – or too much – hearing protection


Both under and over protection can lead to hearing loss/other injuries, although in different ways.


Over protection

From forklifts backing up to machinery running wrong to shouts from colleagues, over protection runs the risk of employees not hearing warnings.


Employees who are wearing too high of an NRR also are more likely to remove their hearing protection when they need to communicate, exposing them to dangerous levels of noise.


Under protection

Under protecting employees is also dangerous, and can lead to hearing loss. An NRR that’s too low may reduce the noise somewhat, but not enough to fully protect against dangerous levels. It’s important to be aware of employee’s TWA (time-weighted average) of noise exposure, as extended shift periods or moving around facilities can impact the effectiveness of hearing protection.


Request noise mapping or dosimetry


Choosing the best hearing protection options for your team


When choosing hearing protection for industrial employees, there’s more to it than looking at Noise Reduction Ratings.


Will employees wear them correctly and consistently?

Regardless of the labeled NRR, your employees won’t receive protection if they’re not wearing the hearing protectors correctly, every time they’re exposed to dangerous noise. It’s important to provide a choice of protectors that will be worn right, every time.


Are they comfortable for extended periods of time?

If the hearing protection isn’t comfortable, employees won’t wear it. Or they won’t wear it correctly. Either way, the employees won’t receive the labeled attenuation.


Since every ear is unique, this means universal products may not work well for many employees.


Check out custom hearing protection options


Custom hearing protection: the best option for industrial workers


Custom hearing protection ticks all these boxes, and more. From enhanced (and safe) communication options to compatibility with other PPE, a customized solution is more effective for more employees.

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By Mary Jane Bumanglag July 13, 2026
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A respirator that fit perfectly last year may no longer provide adequate protection today. Changes that can affect respirator fit include: Weight gain or weight loss Changes in facial structure Different respirator sizes or models Wear and tear on the respirator itself Damaged face seals or malfunctioning valves Annual testing gives employers confidence that their workers remain protected while giving employees peace of mind that their respirator is functioning as intended. The Biggest Misconception About Annual Fit Testing One of the most common misconceptions is that once an employee passes a fit test, they're protected indefinitely. In reality, respirators come in different sizes, and employees' faces can change over time. Even a small change can affect the seal, reducing the respirator's effectiveness. Another overlooked issue is equipment condition. During fit testing, damaged facepieces, cracked seals, or faulty exhalation valves are often discovered—problems that may otherwise go unnoticed until the respirator fails when it's needed most. Annual fit testing helps identify these issues before they become workplace safety incidents. Skipping annual fit testing can create significant risks for both employers and employees. Reduced Respiratory Protection - A respirator that no longer seals properly allows contaminated air to bypass the filter, exposing workers to hazardous airborne substances. Compliance Violations - Missing required fit testing can result in OSHA non-compliance, potentially leading to citations, fines, and increased legal liability. Increased Workplace Risk - Employees who are unsure whether their respirator fits correctly may lose confidence in their protective equipment, affecting both safety and morale. Simply wearing the correct respirator model isn't enough. 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When respiratory hazards are involved, objective measurements provide employers with stronger evidence that their respiratory protection program is working effectively. Schedule Your Annual Fit Testing Today Annual respirator fit testing protects your employees, supports OSHA compliance, and helps ensure your respiratory protection program performs when it matters most. Don't wait until the last minute. Schedule your annual respirator fit testing at least three months before your compliance deadline to avoid delays and keep your workforce protected. Contact Anadyne today to book your respirator fit testing and keep your compliance program on track .
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