Kolundzija, MihailoFaller, ChristofVetterli, Martin2010-05-262010-05-262010-05-262010https://infoscience.epfl.ch/handle/20.500.14299/50439Gradient based microphone arrays, the horizontal sound field's plane wave decomposition, and the corresponding circular harmonics decomposition are reviewed. Further, a general relation between directivity patterns of the horizontal sound field gradients and the circular harmonics of any order is derived. Based on this relation, a number of example differential microphone arrays are analyzed, including arrays capable of approximating the sound pressure gradients necessary for obtaining the circular harmonics up to order three.Gradient microphonesSound field measurementMicrophone arraysNCCR-MICSNCCR-MICS/EMSPtext::conference output::conference proceedings::conference paper