In memory of Stefan Czarnecki, man and scientist

The outstanding Polish scientist, in the field of acoustics, Prof. Dr. Stefan CZARNECKI died in Warsaw on 1 September, 1982. Stefan CZARNECKI was born in Warsaw on 20 September, 1925. In 1945 he began his studies at the GdaAsk Technical University, to graduate in 1949 from its Electrical Engineering Department (Radiotechnology Section), achieving the M. Sc. degree with his dissertation The scaling of dynamic microphones by the reversibility method. After working a few years at the Central Laboratory of the Polish Radio and at the Warsaw Technical University, in 1953 he began to work at the Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw. In 1959 he achieved his D. Sc. degree from the Scientific Council of the Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, for his dissertation The irregularities of acoustic behaviour in enclosures. In 1965 he received his habilitation at the Institute of Fundamental Technological Research, for his dissertation The interaction of Helmholtz resonators with the surrounding medium and in 1966 he was nominated assistant professor. In 1963-1974, he worked at the Institute of Automation, and subsequently at the Institute of Organization and Management, Polish Academy of Sciences, as head of the Analogy Department. Since 1974 he has worked at the Institute of- Fundamental Technological Research, Polish Academy of Sciences, as head of the Aeroacoustics Department. In 1972 he was nominated professor by the State Council and full professor in 1980.