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I was looking for an earmuff with a large sound insulation ratio because the engine sound was noisy when I flighted a motor paraglider and the radio was difficult to hear. We chose this product with cheap price in the top class sound insulation ratio even in the mono tallow lineup. The comfortable feeling is compact but the sound insulation rate is also high, the sound noise is turned off and the radio becomes easy to hear, the sound insulation rate changes according to the pressure pressing on the ear (temporal part), even if it takes a long time it does not hurt I adjust it to use it. (The sound insulation rate will be worse somewhat.)
I think that the effect of soundproofing is very good. Although it may be useless for soundproofing, there are considerable thicknesses, and there are nearly twice the things we have used up to now. I am very satisfied if I am a bit more slim.