Nightingale, T.R. T., and J. D. Quirt. “Degradation of Wood Stud Wall Sound Isolation by Electrical Boxes”. Canadian Acoustics 23, no. 3 (September 1, 1995): 55-56. Accessed May 10, 2021. https://jcaa.caa-aca.ca/index.php/jcaa/article/view/940.