In June 2011, Polish Section of the Audio Engineering Society will celebrate its 20th anniversary. On this occasion, the society officers, ending their second, two-year term, present a short summary of the Section's activity during the past four years. The Section's structure comprises the main unit - that is the Polish AES section, and three student sections, associated with the Department of Multimedia Systems at the Gdansk University of Technology, the Chair of Acoustics at the Wroc?aw University of Technology, and the Department of Mechanics and Vibroacoustics at the AGH University of Science and Technology in Cracow. The latter section began its activity only last year. In addition to formal student sections, in the activities of the Polish AES Section also participate students of the Department of Sound Engineering, at the The Fryderyk Chopin University of Music in Warsaw, and students of the Department of Elecroacoustics, at the Warsaw University of Technology.