George Miner II, 41, a senior engineer and test specialist with the Johns Hopkins University Applied Physics Laboratory who was an authority in acoustics, was found dead July 23 in his hotel room in Honolulu.

A spokesman for the Honolulu Medical Examiner's Office said that the cause of Mr. Miner's death has not been determined and is under investigation. Mr. Miner, who lived in Silver Spring, was in Hawaii on business at the time of his death.

He joined the Applied Physics Laboratory in 1972. Over the years, he worked on the development and application of underwater oceanographic equipment systems, and helped direct equipment field tests.

Mr. Miner was a native of Washington. A valedictorian of the 1962 class of Gonzaga College High School, he earned a bachelor's degree in electrical engineering at Princeton University and a master's degree in mechanical engineering at Catholic University.

Before joining the laboratory, he had been a mathematics instructor and assistant headmaster at Gonzaga and vice principal of the Ralph Young Boys School in Baltimore. He had been a consultant to the Redevelopment Land Agency, the Naval Oceanographic Office, the old U.S. Weather Bureau and the National Bureau of Standards.

Mr. Miner had served on the laboratory's affirmative action committee and on the Gonzaga Alumni Board of Governors.

Survivors include his parents, George W. and Charlotte B. Miner, both of Washington; a brother, William G., of Alexandria, and three sisters, Charlotte M. McPherson of Brooklyn, N.Y., Grace M. Moss of Greensboro, N.C., and Lucinda E. (Cindy) Miner of Washington.