Boudreau, A., A. L’Esperance, J. Nicolas, and G. Daigle. “Long Range Outdoor Sound Propagation Model”. Canadian Acoustics 23, no. 3 (September 1, 1995): 93–94. Accessed April 19, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/957.