Wu, Weixiong. “Prediction Model ‘IMPACT’ to Determine the Acoustic Effect of Noise Barriers Along High Speed Roads”. Canadian Acoustics 24, no. 3 (September 1, 1996): 85–86. Accessed May 15, 2026. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1056.