@article{heyser1971determination, title = {Determination of Loudspeakier Signal Arrival Times: Part III}, author = {Heyser, Richard C.}, journal = {J. Audio Eng. Soc}, volume = {19}, number = {11}, pages = {902--905}, year = {1971}, url = {https://www.aes.org/e-lib/browse.cfm?elib=2118} }