Palardy, M.-J., C. Giguère, and C. De Segovia. “Perception of Increasing or Decreasing Signal Intensity and Effects of Compression by Hearing Aids”. Canadian Acoustics, vol. 31, no. 3, Sept. 2003, pp. 82-83, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1561.