NRR(Noise Reduction Rating,降噪率),是由美国环境保护组织(EPA)于1979 年颁布的一个用于衡量听力保护产品的抗噪性能的标准。目前市面上出售的抗噪产品 NRR 大致上在 0-40dB 的范围里。 ● SNR和NRR怎么计算? 《GBZ2.2-2007工作场所有害因素职业...
Total options:6 Type;1 Noise Reduction Rating. Select now Type(6):pink pink fireworks rap music custom mixture Noise Reduction Rating(1) 23dB Shipping Shipping solutions for the selected quantity are currently unavailable Secure payments Every payment you make on Alibaba.com is secured with strict...
Features full dynamic range HD speakers for clear balanced sound with sound activated compression reaction of 0.02 seconds Boasts a noise reduction rating of 23 dB with 2 omni directional microphones Low noise / frequency tuned for natural sound clarity Color: Multicam Dimensions (L x ...
Select now Type(1): Earmuff Earmuff Noise Reduction Rating(1) 23dB Shipping Start orderAdd to cart Still deciding? Get samples first! Order sample Protections for this product Delivery via Expect your order to be delivered before scheduled dates or receive a 10% delay compensation Secure ...
The highest NRR for earplugs on the market is 33. But you might see some products that have a rating of 37. How is that possible? Well, it’s not. Not with the NRR anyway. But your eyes aren’t playing tricks on you. That 37 is actually the SNR – the Single Number Rating. Th...
It stated that HPD performance is characterized by the Noise Reduction Rating (NRR) that is determined by testing the HPD at a laboratory and then performing some computations. Furthermore, the U.S. Environmental Protection Agency (EPA) which codified the numerical value of the NRR defines that...
Hearing Protectors 2009:Rating, Evaluation and the NRREven with careful attention to administrative and engineering controls, hearing protection devices often are the first and only choice when it comes to protection from hazardous noise exposure. The good news is that hearing protection devices (HPD)...
Mack’s Original Soft Foam Earplugs are molded with super low-pressure, skinned and tapered foam to provide unmatched comfort and improved hygiene. With a high noise reduction rating (NRR) of 32 decibels, this high-performance hearing protection can be used in environments where noise is just ...
NRR,orNoiseReductionRating,isaguideline thatindicatestheamountofpotentialprotection ahearingprotectiondevicewillgiveinanoisy environment. NRRisthedecibel(dB)reductionprovidedby hearingprotectionbasedonlaboratorytestdata. However,thesetestscan’tpossiblyaccountforall thevariablesofatypicalworkplace.Eventhough ahigherNRR...
Make your work safer and more enjoyable with ISOtunes PRO 2.0 Bluetooth hearing protection earphones. Certified 27 dB Noise Reduction Rating (NRR) for superior noise isolation, ISOtunes PRO 2.0 delivers unmatched durability, improved usability, and 16+ h