1. Introduction
Three dimensional soundfield reproduction is a well researched topic due to its plethora of applications such as home-theatre systems, in-car audio systems, communication devices, and noise cancellation. There exists a number of soundfield reproduction methods such as amplitude panning [1]–[4], wavefield synthesis [5]–[8], Ambisonics [9], [10], and higher-order Ambisonics (HOA) [11]–[14].