Remote Audio HN7506 High-Noise Isolating HeadphonesThese surprisingly comfortable phones have been a big hit for professionals who want to protect their ears while monitoring the quality of their recordings. Sealing off outside ambience by as much as 45dB, the HN 7506 is designed to sound like the industry standard Sony MDR 7506, and allows the switch from one to another without loss of monitoring standard and reliability. Sound mixers often find themselves in very high noise environments such as