At first I did not understand how these were supposed to work. After some research I now grasp the concept behind these. They are not to get rid of noise from the environment but only to reduce. At first I was expecting these to block out all noise. I first put them on and could actually hear what people next to me talking with out any problems at all. Their voices were only slightly reduced in volume. So I had to do some research on why they were not blocking out the noise. Here is what I found out:
How does NRR change decibels of exposure?
When hearing protection is worn, your level of exposure to noise is based on the NRR rating of the protection device being used. Keep in mind, however, that while the NRR is measured in decibels, the hearing protector being used does not reduce the surrounding decibel level by the exact number of decibels associated with that protector’s NRR. For example, if you are at a rock concert where the level of noise exposure is 100 dB and you are wearing earplugs with an NRR 33dB, your level of exposure would not be reduced to 67 dB. Instead, to determine the actual amount of decibel deduction applied (when decibels are measured dBA which is the most common), you take the NRR number (in dB), subtract seven, and then divide by two. Given the previous example, your noise reduction equation would look like the following: (33-7)/2 = 13. This means that if you are at a rock concert with a level of noise exposure at 100 dB and you are wearing a hearing protector with an NRR 33 dB, your new level of noise exposure is 87 dB. If you are wearing a product with an NRR of 27 it would deduct 10 decibels (27-7/2=10).
So with that in mind 29-7/2 = 11 decibles of reduction from these ear muffs. These do perform well at reducing the incoming noise without doubt. They offer a decent level of protection to your ears if you are in a loud environment. For instance, a machine shop, firing ranges, or even a concert. I recommend these for sure if you are in a loud environment for your own protection. They are your ears and you should make sure to take care of them.
The design of the ear muffs are exceptional. They fold up and to a fairly small package to make them easy to transport. They adjust to just about anyones head. The padding around the ears is very comfortable and seal against the head firmly. They also come with a FSL lifetime support and 3 Year warranty. I would like to thank IHeadphones and affiliates for sending me these ear muffs to try out and leave my opinion.
Can be found at:
http://goo.gl/MHNgq0
Hash Tag Users: #FSLGunblockEarDefenders.
Disclosure of Material Connection: I received a sample for free in the hope that I would mention it on my blog. Regardless, I only recommend products or services I tried personally and believe will be good for my readers. No other form of compensation was received. I am disclosing this in accordance with the Federal Trade Commission’s 16 CFR, Part 255: “Guides Concerning the Use of Endorsements and Testimonials in Advertising."
