Tools To Learn

Hearing Protectors ­- Earmuffs

HP Earmuffs - Body: 

Sound Source: Absorbent Pads and Earmuffs

We work in a humid environment and use moisture-absorbing pads with our earmuffs. Do the absorbent pads affect the attenuation of the earmuff?
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Sound Source: Radio Earmuffs & Noise Exposure

Some new earmuff models have built-in AM/FM radios. When using these earmuffs in industrial settings, doesn’t the radio just add more noise to damage hearing? What are the noise levels under the earcup when the radio is turned on?
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Sound Source: Earmuffs & Safety Eyewear

In our facility, several noisy work areas require safety eyewear as well as hearing protection. Can earmuffs be worn over safety eyewear without affecting attenuation?
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Sound Source: Air Flow Control™ Technology

Howard Leight® recently introduced Air Flow Control™ technology into its Leightning® and Thunder® series earmuffs. What is Air Flow Control?
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Hearing Protectors - ­Earplugs

HP Earplugs - Body: 

Assessing Fit Effectiveness of Earplugs

The published Noise Reduction Rating (NRR) is a laboratory estimate of a hearing protector’s effectiveness. But how well does that protector actually perform in the ear of a noise-exposed worker in the workplace?
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Noise + Sound

Noise & Sound -Body: 

Sound Source: Extreme Frequency Noise

Do earplugs and earmuffs offer protection from audible noise in the extreme low and high frequencies?
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Sound Source: Dual Protection

How much reduction in noise level can we expect from using both earplugs and earmuffs simultaneously?
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Sound Source: A- and C-Weighted Noise Measurements

Hearing protector literature makes reference to A-weighted and C-weighted noise measurements. What are A-weightings and C-weightings?
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Regulatory Practices

Regulatory - Body: 

Sound Source: How NRR Is Calculated

When I compare the values in the attenuation charts with the NRR on the package, the NRR is much lower than the average attenuation. How is the NRR calculated?
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Sound Source: Understanding Ratings

Hearing protector device packaging displays a series of rating numbers, including NRR, SNR and SLC80, What do these rating numbers mean?
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Sound Source: OSHA Hearing Conservation Violations

In the Unite States, what parts of OSHA’s Hearing Conservation regulations are cited most frequently in compliance inspections?
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Sound Source: Changes in EU Noise Directive

How do recent changes in the European Union Noise Directive affect workers, and what must employers do to implement it?
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Sound Source: How SLC80 Is Calculated

When I compare the values in the attenuation charts with the SLC80 on the package, the SLC80 is much lower than the average attenuation. How is the SLC80 calculated?
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Sound Source: How SNR Is Calculated

When I compare the values in the attenuation charts with the SNR on the package, the SNR is much lower than the average attenuation. How is the SNR calculated?
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