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NOISE CANCELLATION TECHNOLOGIES, BALTIMORE GAS & ELECTRIC FORM GROUP TO DEVELOP, COMMERCIALIZE ACTIVE TRANSFORMER QUIETING SYSTEMS FOR UTILITIES

 BALTIMORE, Nov. 17 /PRNewswire/ -- Baltimore Gas and Electric Company (NYSE: BGE), Noise Cancellation Technologies, Inc. (NASDAQ-NMS: NCTI) and Active Acoustical Solutions, Inc. (AAS), have formed a group to fund the final development and commercialization of NCT's patented active structural and acoustic control technology to quiet noise generated by electrical power transformers.
 BG&E is the first to subscribe to this effort and is assuming the lead within the utility industry for the group.
 Beginning in 1994, up to 25 transformers representing various manufacturers, locations and sizes -- ranging from 1 million volt amperes (MVA) to 100 MVA base rating -- will be selected for installation of prototype systems. The results from tests on the actively quieted transformers will enable NCT engineers to complete development of low-cost systems for commercial use.
 NCT and AAS initiated the utility group following two successful installations of the quieting system -- at BG&E, on a 25 MVA transformer, and at Manitoba Hydro (Canada), on a 7.5 MVA transformer.
 "We expect a strong response to this idea from progressive utility companies throughout North America," said Chuck Lacey, senior project engineer for BG&E.
 "Interest in our transformer-quieting technology and the formation of the utility group has been high since active technology successfully reduces low-frequency transformer noise which can be annoying to residential customers who live near a substation," said John McCloy, chairman, NCT. "The technology provides a more efficient, effective and less costly solution to transformer noise than existing passive sound barriers currently in use throughout the utility industry."
 Active noise control technology utilizes highly sophisticated digital signal processing software for high-speed analysis of selected, undesirable noises in a chosen environment. Based on that analysis, the system produces an equal but opposite sound wave, called "anti-noise," which attenuates unwanted noise.
 Baltimore Gas and Electric, with assets of more than $7 billion, is one of the nation's oldest gas utilities and one of its first electric utilities. Its 2,300-square-mile service territory covers central Maryland and includes more than 1 million customers.
 Active Acoustical Solutions, based in New York and with offices in Stamford, Conn., provides engineering services in active noise and vibration control for the energy industry and the industrial manufacturing sector.
 Noise Cancellation Technologies, an industry leader in active noise and vibration reduction, has executive offices in Stamford; research and development facilities in Linthicum, Md., and Cambridge, England; and marketing and technical support offices in Tokyo.
 -0- 11/17/93
 /CONTACT: John A. Metzger of Baltimore Gas and Electric, 410-234-7433/
 (BGE)


CO: Baltimore Gas and Electric Company; Noise Cancellation
 Technologies, Inc.; Active Acoustical Solutions, Inc. ST: Maryland, Connecticut, New York IN: UTI ENV SU: JVN


LJ -- PH017 -- 5445 11/17/93 11:39 EST
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Publication:PR Newswire
Date:Nov 17, 1993
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