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2. NIOSH air filtration rating - Wikipedia

   en.wikipedia.org/wiki/NIOSH_air_filtration_rating

   The NIOSH air filtration rating is the U.S. National Institute for Occupational Safety and Health (NIOSH)'s classification of filtering respirators. The ratings describe the ability of the device to protect the wearer from solid and liquid particulates in the air. The certification and approval process for respiratory protective devices is ...

3. Ray J - Wikipedia

   en.wikipedia.org/wiki/Ray_J

   Sanctuary. Atlantic. Elektra. EastWest. Musical artist. Website. rayj .com. William Ray Norwood Jr. (born January 17, 1981), [1] known professionally as Ray J, is an American R&B singer, songwriter, television presenter, and actor. Born in McComb, Mississippi and raised in Carson, California, he is the younger brother of singer and actress Brandy.

4. K&N Engineering - Wikipedia

   en.wikipedia.org/wiki/K&N_Engineering

   Air filters soon became the primary focus of the company. In 1992, K&N introduced bolt-on cold air intake kits. K&N also released a line of oil filters with a stamped hex to accept a standard wrench off filter removal. In 2019, K&N released a line of washable home A/C filters, [4] and began offering motor oil and wiper blades in 2021.

5. Take 20% Off Raycon Earbuds, Headphones and Speakers ... - AOL

   www.aol.com/entertainment/20-off-raycon-earbuds...

   These Basic Earbuds. The Work Earbuds Classic. Raycon. For everyday wear that’s easy to take in and out, these buds are the perfect pick! See it! Get The Work Earbuds Classic (originally $120 ...

6. FYI, AirPods are the same price they were on Prime Day - AOL

   www.aol.com/lifestyle/fyi-airpods-are-the-same...

   Apple AirPods (2nd Generation) $80 $129 Save $49. This is an outrageous price for AirPods! In fact, it's a record-low price, so if you've been toying with a pair or need to replace your current ...

7. Constant k filter - Wikipedia

   en.wikipedia.org/wiki/Constant_k_filter

   L 1 = C 2 k 2 and L 2 = C 1 k 2 Image impedance Z iT of a constant k prototype low-pass filter is plotted vs. frequency . The impedance is purely resistive (real) below , and purely reactive (imaginary) above . The building block of constant k filters is the half-section "L" network, composed of a series impedance Z, and a shunt admittance Y.