Voix, Jérémie, and Frédéric Laville. “New Method and Device for Customizing in Situ a Hearing Protector”. Canadian Acoustics 32, no. 3 (September 1, 2004): 86–87. Accessed August 19, 2022. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1640.