whale
Introduction

Founded in 1983, Greeneridge Sciences, Inc. is among the first independent companies dedicated to documenting the acoustic environment of aquatic animals. Greeneridge 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 quarter-century 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 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 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; 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. 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 new affiliation formalizes a long history of partnership with LGL on the topic of noise and marine wildlife. Read the full text of the announcement here.