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OPIS PRODUKTU Brand Name MOKARLE;Origin China Mainland;Function Anti dust;Protection class NONE;Life cycle Non disposable;Applicable Adult;Material Polyester;Size one size;Certification ce;Model Number Noctilucent Mouth Mask;Safety standard GB2626 2006;Quantity 1piece;Item Type Masks;noctilucent mask Dust proof;Mouth muffle Anti Bacteria;mouth mask mask on mouth;dust mask black mask
Apr 08, 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.
10 Pcs N95 Mask Dustproof Anti fog Breathable Face Mask 95% Filtration KN95 Mouth Masks FFP2 FFP3 Protective Mouth Muffle Cover SKU4000829276353 CategoriesChina , France , N95 , Russian Federation , Spain , United States TagsChina , France , N95 , Russian Federation , Spain , United States
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