H. Steven Colburn is a researcher in auditory science and a coauthor with Abhijit Kulkarni of a 2000 study of headphone transfer function measurements. Using the KEMAR acoustical manikin, they repeatedly repositioned headphones and measured how their frequency response changed. This isolated placement variability while retaining the same experimental head and headphone system.[ref]
Variability in the characterization of the headphone transfer-function by Abhijit Kulkarni and H. Steven Colburn. Original paper Abstract and Introduction; Journal of the Acoustical Society of America 107, 1071–1074, 2000
A compensation filter based on one placement can become inaccurate after the cushion moves. The experiment therefore distinguishes a nominal device description from the sound actually delivered at the measurement point. That distinction matters when a hearing experiment depends on a precisely specified acoustic stimulus.[ref]
Variability in the characterization of the headphone transfer-function by Abhijit Kulkarni and H. Steven Colburn. Abstract and section I: headphone compensation and placement-dependent response
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