1. See e.g. the application of the so called Vitruvius vases to improve the acoustics of ancient Greek theatres and Turkish minarets. Referenced by Tarnóczy: Acoustical design. Müszaki Könyvkiadó, Budapest, 1966. (In Hungarian)
2. Duhamel, J.M.C. (1849), On the vibration of a gas in cylindrical, conical etc., tubes, J. Math. Pures Appl., 14, 49–110.
3. Rayleigh, J.W.S. (1945), The Theory of Sound, Vol. 2, 2
nd ed., Dover, New York,.
4. Schuster, K. and Wetzmann, E. (1929), On reverberation in closed spaces, Ann. Phys., 1(5), 671–695.
5. Strutt, M.J.O. (1929), On the acoustics of large rooms, Phil. Mag., 8(7), 236–250.