Ma, Y., Caswell, D., Dai, L. and Goodchild, J. (2005) “Impact of languages to speech privacy and intelligibility of closed spaces”, Canadian Acoustics, 33(1), pp. 3–9. Available at: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1710 (Accessed: 20 October 2021).