Abhijit Kulkarni is the first author, with H. Steven Colburn, of a 2000 study measuring variability in the headphone transfer function. Repeated placements on the KEMAR acoustical manikin changed the measured response, making it difficult to choose one inverse filter that reliably canceled the headphone contribution.[ref]
Variability in the characterization of the headphone transfer-function by Abhijit Kulkarni and H. Steven Colburn. Original Abstract: repeated cushion placement and compensation problem
The method supplies a clear example of measurement reproducibility. Repeating a measurement after removing and replacing the apparatus tests a different source of variation from repeating it without disturbing anything. The study identified the physical coupling of headphones to the ear region as part of the experimental system, rather than assuming an electronic input alone fixed the acoustic output.[ref]
Variability in the characterization of the headphone transfer-function by Abhijit Kulkarni and H. Steven Colburn. Introduction and Figures 1–2: placement trials and equalization comparisons
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