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DASARs in front of oil production island

About Greeneridge

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Greeneridge Sciences, Inc. was founded by Dr. Charles Greene in 1983, and named for the eponymous Greene Ridge, Antarctica.  Greeneridge is among the first independent companies dedicated to documenting the acoustic environment of aquatic animals. The company provides accurate and relevant environmental reporting with a commitment to academic-quality research, standards-based analysis, and awareness of underlying biological issues. Over its long history, Greeneridge has explored the calling behavior of several protected marine species, first and most frequently beluga and bowhead whales, and has measured and modeled underwater noise originating from a wide variety of industrial and military sources. These sources include propeller-driven and jet-driven vessels, icebreakers, drill ships, and dredges; explosions, pile drivers, and airgun arrays; rockets, helicopters, and jet aircraft; and the construction and operation of artificial drilling islands. Greeneridge's more than three decade working relationship with federal, Alaskan, and native agencies, its frequent participation on federal expert panels, and its contributions to the literature are evidence of its extensive reputation. Founder and President Emeritus Dr. Charles Greene co-authored the widely-read book Marine Mammals and Noise, published in 1995 by Academic Press, with Dr. W. John Richardson and Denis Thomson of LGL Limited and Dr. Charles Malme of BBN

Greeneridge's broad field experience encompasses both terrestrial and marine settings, particularly in the Alaskan and Canadian Arctic but also in Washington-state rivers, coastal California, the Bay of Fundy, Cook Inlet, and Hong Kong. The instrumentation used in these settings includes boat-based or autonomous hydrophone arrays; sonobuoys deployed from aircraft; geophones placed on ice and land; and microphones located near aircraft or missile flight paths. 

Greeneridge develops custom hardware and software, either as necessary to meet project requirements or for direct sale. Greeneridge-developed products include directional-sonobuoy (DIFAR) demultiplexing software; autonomous self-contained seafloor acoustic recorders (ASARs and DASARs); sonobuoy-based detection and ranging systems; and a miniature acoustic recorder for attachment to wildlife. 

Greeneridge maintains a professional staff of three Ph.D. scientists and engineers and one MS engineer. In addition, the company retains the professional services of marine hardware, software and electronics consultants in developing and using instrumentation for field projects. 

In September 2008, Greeneridge joined the LGL Group of environmental companies. Our affiliation formalizes a long history of partnership with LGL on the topic of noise and marine wildlife.

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Santa Barbara, California
90 Arnold Place, Suite D
Santa Barbara, CA 93117 USA
Tel: 805.967.7720
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LGL is an employee-owned group of companies, including Greeneridge Sciences, performing environmental research and consulting in the U.S.A., Canada, and internationally.

Corporate Offices


PO Box 280, 22 Fisher Street
King City, ON L7B 1A6 Canada
Tel: 905.833.1244



2000 W International Airport Road, Suite A‑1
Anchorage, AK 99502 USA
Tel: 907.562.3339

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