Passive Hydroacoustic Research

Lamont Doherty Earth Observatory of Columbia University

Cartoon of SOFAR moored hydrophone used to monitor sound in the ocean.

Homepage of Passive Hydroacoustic Research Group at LDEO

By recording sounds transmitted through the ocean’s low-velocity waveguide (SOFAR, or SOund Fixing And Ranging Channel), LDEO researchers can monitor a number of natural and anthropogenic processes. 

Lamont-Doherty Earth Observatory

61 Route 9W

PO Box 1000

Palisades, NY 10964

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E-mail: del@ldeo.columbia.edu