1. Department of Speech-Language Pathology and Audiology, University of Pretoria, Gauteng, South Africa
2. Virtual Hearing Lab, Collaborative Initiative Between University of Colorado, Aurora, Colorado, USA and the University of Pretoria, Pretoria, South Africa
3. Department of Science, Mathematics and Technology Education, Faculty of Education, University of Pretoria, Gauteng, South Africa
4. Ear Science Institute Australia, Subiaco, Australia