Howard Leight Demonstrates High-Tech Hearing Protection. Oct 25, 2007; In its first major show since changing its name from the Bacou-Dalloz Hearing Safety Group, Sperian Hearing Protection LLC ...

Howard Leight Industries' MAX Earplug is made of a soft meterial formulaton, is easy to insert and comfortable to wear. The earplug has a NRR of 33 dB as verified by independent ...