Ambient Signs First International License Agreement with Chilean Utility.

Business Editors

NEW YORK--(BUSINESS WIRE)--April 15, 2003

Compania Americana de Multiservicios Ltda., (CAM), a subsidiary of

Enersis Group, to Evaluate Ambient's Power Line Communication

Technology

Ambient Corporation (OTC BB: ABTG), a leader in Power Line Communications technology (PLC), announced today that Compania Americana de Multiservicios Ltda., (CAM), subsidiary of Enersis, a Chile-based provider of electrical power, will evaluate Ambient's Power Line Communication Technology.

Enersis has subsidiaries is Argentina, Colombia, Peru, and Brazil, and services more than 10 million customers. CAM is 100 percent owned by Enersis S.A., which is itself 65 percent owned by Endesa, the largest utility in Spain.

Under terms of the deal, Ambient will provide CAM the couplers necessary for the utility to convert a portion of Enersis overhead power distribution network into a high-speed broadband data pipeline. The agreement provides for joint installation and testing of Ambient's products on Enersis medium and low voltage lines.

CAM is operating a successful PLC trial in Santiago since March 2002, in which a group of volunteers has Broadband Internet access and voice over IP service, in a high standard commercial neighborhood in Santiago. This trial is being performed by CAM on the power distribution grid operated by Chilectra, an electric utility 98% owned by Enersis. Internet access service quality in this trial has had a 98% "good or excellent" evaluation, according to customer surveys, and data transmission rate reaches up to symmetric up/down 10 Mbps to the final customers. This trial demonstrates that PLC deployment in Chilectra's power distribution grid is both technically and commercially viable. Final decision to start the commercial rollout of PLC in Santiago during this year is expected soon.

The two companies will conduct a trial deployment in Santiago, Chile. In a first short stage, the trial will focus on pure data transmission through 12 kV medium tension network, in order to test a possible future deployment of part of a telecommunications backbone using Ambient's technology. In a second stage, it will involve a substation that ties into the fiber-optic data stream and will distribute data on a 12 kV circuit serving about 180 homes, small business and stores, which is part of CAM's PLC trial. Installation will begin later this month and is expected to be completed during the month of May. The evaluation will last throughout 2003, and the deal will generate fee income for Ambient this quarter.

"Ambient's Power Line Technology can potentially help us deliver high-speed Internet access throughout Santiago," said Jorge Rosenblut, Enersis PLC Project General Coordinator and Chairman of Chilectra. "Currently, almost 100% percent of the urban population have electrical power, but only 55% percent have potential access to high-speed broadband connections through traditional telecommunication networks. As a result, Ambient's technology holds huge market potential."

"Today's agreement with CAM marks another important milestone in the development and commercialization of Ambient's PLC technology globally," said John Joyce, Chief Executive Officer of Ambient. "With development deals ongoing with two of North America's larger utility companies, Ambient is clearly very rapidly bringing this important technology to the mass market."

The market for PLC technology is potentially vast. Access to electricity and the electrical grid is ubiquitous inmost markets of the world. PLC offers a way to hook into the Internet in regions that lack a more traditional communications infrastructure. In India for example, 85 percent of the Indian population have electricity, but only 1 percent have telephone service.

This latest deal builds on similar announcements with Southern Telecom, a wholly owned subsidiary of Southern Company and Consolidated Edison Company of New York.

About Ambient Corporation:

Ambient Corporation (OTC BB: ABTG) is a development stage company engaged in the architecture, design, development, and implementation of a proposed comprehensive high-speed communication infrastructure designed to utilize existing electrical power distribution lines as a communication medium - Power Line Communication - PLC. www.ambientcorp.com

About Enersis - CAM - Enersis PLC Project

ENERSIS is a Chilean based electric holding, with presence in the generation & distribution markets in Chile, Colombia, Brazil, Peru and Argentina. Owned 65% by ENDESA from Spain, ENERSIS is the largest privately held electricity utility in Latin America, with 10 million customers and 45.760 GWh/year in total energy production capacity. www.enersis.cl / www.enersisplc.cl

This press release may contain forward-looking statements that involve risks and uncertainties. These statements may differ materially from actual future events or results. Readers are referred to the documents filed by Ambient Corporation with the SEC, including the company's most recent report on Form 10-K and 10-Q, which identify important risk factors that could cause actual results to differ from those contained in the forward-looking statements.

Ambient is a trademark of Ambient Corporation registered in the U.S. Patent and Trademark Office. Southern Telecom is a registered trademark of Southern Telecom in the United States. All rights reserved.