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Oct 01, 2020 · According to the research by American Speech-Language-Hearing Associacion, the volume of a normal speech is 50-60 dB.Thanks to the insulating properties of its body, Hushme in passive mode is capable to lower some to 25 dB. Thus, the volume of the resulting sound using the mask will be approximately 25-30 dB, which corresponds to a whisper or noise level in a quiet library. Medical Supplies, Anti-epidemic Masks, Test Kits price niosh certification mouth muffle austria; wear comfortable kn90 mouth muffle in japan; medical surgical mask production equipment manufacturers; akn95 afpp2 afpp3 civilian face mask afda ace cetified; igg igm rapid test kit inspection free output philippines; protective anti fog anti bacteria proof mouth mask color Washable Mouth Cover Face Cover Dustproof Cycling Mouth Dustproof and Windproof. Youth Knee Elbow Pads Mountain Bike Cycling Dirtbike Elbow Guard Protective Gear. Application:Motorcycle, Cycling, Running, Hiking, Bicycle and Other outdoor activities. Youth MTB Knee Pads Elbow Pads Set Kids Knee Guard Cycling Bike Protector.
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Oct 01, 2020 · According to the research by American Speech-Language-Hearing Associacion, the volume of a normal speech is 50-60 dB.Thanks to the insulating properties of its body, Hushme in passive mode is capable to lower some to 25 dB. Thus, the volume of the resulting sound using the mask will be approximately 25-30 dB, which corresponds to a whisper or noise level in a quiet library.