Optimum Sound Attenuation in a Rectangular Duct with Impedance Walls

Sound propagation in an anechoic long room

“…Note that the found variations of the reverberation time with the distance corelate partially with the previous results [6]. However, additional analysis is required to understand which theory [1][2][3][4][5][6][7][8][9][10][11] best describes the obtained results.…”

“…To describe the sound propagation in them one can use the theory of ducts with impedance walls [1] or other classical approaches [2,3]. Today the theory of sound field in long rooms is being intensively developed [4][5][6][7][8][9][10][11][12]. At the same time, we can observe a lack of experimental data for fullscale rooms.…”