Voix, Jérémie, Alberto Behar, and Willy Wong. “The ANSI Standard S12. 68-2007 Method of Estimating Effective a-Weighted Sound Pressure Levels When Hearing Protectors Are Worn: A Canadian Perspective”. Canadian Acoustics 36, no. 3 (September 1, 2008): 94–95. Accessed March 29, 2024. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2054.