At the Infrasound Laboratory of the University of Hawaii, we use very sensitive microphones to listen to low-frequency sounds in the atmosphere. These sounds, known as infrasound because they are too low in frequency to be audible to the human ear, can carry through the atmosphere for thousands of kilometers.

At ISLA our primary mission is to operate listening stations as part of the International Monitoring System of the Comprehensive Nuclear-Test-Ban Treaty. We also conduct research into acoustic source processes, propagation, instrumentation, signal and array processing, and software development.