October 2012
Intermediate to advanced
368 pages
10h 33m
English
Content preview from The Microphone Book, 2nd Edition
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CHAPTER 5
FIRST-ORDER DIRECTIONAL MICROPHONES
INTRODUCTION
The great majority of directional microphones in professional use today are members of the first-order cardioid family. The term first-order refers to the polar response equation and its inclusion of a cosine term to the first power, or order. These microphones derive their directional patterns from combinations of the pressure and gradient microphones discussed in the previous two chapters. By comparison, a second-order microphone will exhibit a pattern dependent on the square of the cosine term. Stated differently, a first-order microphone has response proportional to the pressure gradient, whereas a second-order design has response that is proportional to the gradient of the gradient. ...
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