1. Acoustic duct with peripherally segmented acoustic treatment;Mani,1976
2. Optimal one-section and two-section circular sound-absorbing duct liners for plane-wave and monopole sources without flow;Lester;NASA TND-8348,1976
3. Theorie der Luftschall-Dämpfung im Rechteckkanal mit schluckender Wand und das sich dabei ergebende höchste Dämpfungsmass;Cremer;Acustica,1953
4. The optimization of modal sound attenuation in ducts in the absence of mean flow;Tester;Journal of Sound and Vibration,1973
5. Effects of wall admittance changes on duct transmission and radiation of sound;Lansing;Journal of Sound and Vibration,1973