
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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