Ryan, J., Shaw, E., Brammer, A. and Zhang, G. (1993) “ENCLOSURE FOR LOW-FREQUENCY ASSESSMENT OF ACTIVE NOISE REDUCING CIRCUMAURAL HEADSETS AND HEARING PROTECTORS”, Canadian Acoustics, 21(4), pp. 19–20. Available at: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/820 (Accessed: 19 April 2024).