While the cardioid polar pattern is undoubtedly the most often used in live sound applications (after all, the ubiquitous Shure SM57 and SM58Â® microphones are both cardioid types), thereâs a case to be made for models that, with the flip of a switch (or the changing of a head) offer directionality options.
Sun Belt. or. southern tier of the United States, focused on Florida, Texas, Arizona, and California, and extending as far north as Virginia. The term gained wide use in the 1970s, when the economic and political impact of the nation's overall shift in population to the south and west became conspicuous.
The Rust Belt is a term for the region straddling the upper Northeastern United States, the Great Lakes, and the Midwest States, referring to economic decline, population loss, and urban decay due to the shrinking of its once powerful industrial sector.The term gained popularity in the U.S. in the 1980s.ince the 1980s, presidential candidates have devoted much of their time to the economic concerns of the Rust Belt region, which contains the populous swing states of Pennsylvania, Ohio, and Michigan.