Xiang Ning, Bush Dane, Summers Jason E
Graduate Program in Architectural Acoustics School of Architecture, Rensselaer Polytechnic Institute, Troy, New York 12180
Applied Research in Acoustics LLC, 1222 4th Street SW, Washington, DC 20024
J Acoust Soc Am. 2015 Apr;137(4):EL261-6. doi: 10.1121/1.4915000.
Coprime linear microphone arrays allow for narrower beams with fewer sensors. A coprime microphone array consists of two staggered uniform linear subarrays with M and N microphones, where M and N are coprime with each other. By applying spatial filtering to both subarrays and combining their outputs, M+N-1 microphones yield M⋅N directional bands. In this work, the coprime sampling theory is implemented in the form of a linear microphone array of 16 elements with coprime numbers of 9 and 8. This coprime microphone array is experimentally tested to validate the coprime array theory. Both predicted and measured results are discussed. Experimental results confirm that narrow beampatterns as predicted by the coprime sampling theory can be obtained by the coprime microphone array.
