Generalized Metrics for Constant Directivity
Rahulram Sridhar, Joseph G. Tylka, Edgar Choueri · Journal of the Audio Engineering Society · 2019
Many applications in audio benefit from transducer arrays whose directional characteristics do not vary with frequency, as for example sound reinforcement and selective microphone beams. The coverage angle should be constant over a usable frequency range. Metrics are proposed for quantifying the extent to which a transducer's polar radiation (or sensitivity) pattern is invariant with frequency. As there is currently no established measure of this quality (often called