Mekid, Samir, M Farooqui, and Z Liu. “Geometry Effects on the Noise Reduction of Helmholtz Resonators”. Canadian Acoustics 42, no. 2 (May 13, 2014): 3–10. Accessed April 25, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2586.