TitleBeamforming using a spherical microphone array based on legacy microphone characteristics
Publication TypeConference Paper
Year of Publication2011
AuthorsPeters, N, W., SAndrew
Conference NameInternational Conference on Spatial Audio
Date Published10/11/2011
Conference LocationDetmold, Germany

This paper presents a numerical approach that projects frequency-dependent directivity patterns of classic recording microphones onto steerable beams created with a spherical microphone array. In an anechoic chamber, the spatial and timbral characteristics of a legacy recording microphone and the characteristics of a 120-channel spherical microphone array were measured. Using a least-square matching approach, the measured frequency responses were used to calculate the set of filters that synthesize the desired legacy recording microphone characteristic from the 120-channel spherical microphone array. Synthesized microphone-beams are shown and compared with the measured characteristics of the original legacy microphones.