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Noise Reduction Rating (NRR) measures the level of sound that hearing protection devices block out. Hearing protectors are foam or silicone earplugs and also many new devices, such as custom molded ear plugs, sound restoration devices, communication headsets, active noise reduction devices. Hearing Protection Devices, also known as hearing protectors, are products that are invented and based on the ability to reduce or block out the level of sound we hear. Such information has to be presented on a label that is clearly visible when we buy or take decision of purchasing. It can be used as standalone instrument and can be purchased at the technical equipment stores.

These products are used in a wide spectrum of noise producing activities ranging from airplanes take off and music concerts to sleep-induced snoring. While you are sleeping you can be disturbed by much lower levels of unwanted sound like 15-20dB.
Be careful with levels higher than 80 dB because if you are exposed for a continuous periods it can cause hearing loss. On the other hand more and more people are getting nervous and sensitive to all kind of urban noises and need earplugs to assure quite sleep at night. It is interesting that a normal conversation is between 44-65dB which is measured from 3-6feet distance.

You have to keep in mind that in order to get the best of using earplugs you have to insert them carefully and properly.
More efficient will be to combine with other methods and measures if possible in order to decrease the noise.

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