Due to the broad diversity of infrasonic vibrations present at any time, we use array processing techniques to discriminate signals from noise. Acoustic arrays are primarily designed permit the recognition of the apparent propagation speed and the angle of arrival of an acoustic signal within a very specific frequency band. ISLA operates two arrays as part of the global infrasound network of the International Monitoring System (IMS), one in Hawaii, and one in Palau.

IMS Arrays

ISLA also operates several smaller local arrays in the Hawaiian Islands as part of the UH infrasound network.

UH Infrasound Network

ISLA has also developed portable systems designed for rapid deployments.