"I'm interested in knowing what exactly makes an omni microphone a \"real\" sound pressure microphone.\n\nI was reading this description of the Jecklin Disk, and how they work ([URL=\"http:\/\/www.josephson.com\/tn5.html\"]on the Josephson website[\/URL]), and it mentions only \"real\" sound pressure microphones will work with a Jecklin Disk. It also states that microphones with variable patterns are not \"real\" sound pressure microphones.\n\nBasically I'm trying to determine if the AT4022 mics will be good candidates for a Jecklin Disk, they are omni, with no variable pattern, so I'm assuming they will work but wanted to make sure (they are directional to some degree at HF).\n\nMany thanks!"