@article{hanna1977the, title = {The Function and Design of Horns for Loudspeakers (Reprint)}, author = {Hanna, C. R. and Slepian, J.}, journal = {J. Audio Eng. Soc}, volume = {25}, number = {9}, pages = {573--585}, year = {1977}, url = {https://www.aes.org/e-lib/browse.cfm?elib=3348} }