Specific outcomes from the project
Display and interpretation factors
Conversion of measured results to perceptually-relevant scale
Once the measured source width and location are on a common scale (using the conversion discussed above), it is possible to display the results on a more perceptually relevant scale, such as perceived angle. This is more intuitive and useful than existing IACC-based metrics that provide results as an abstract coefficient.
The conversion process discussed above means that the measurement outputs a prediction of the perceived width and the perceived location of the sound on a scale of ITD. It would be useful if this information could be output in a form that is more intuitive, such as the angles from directly in front. This conversion can be undertaken based on the assumption that a given ITD can be related to an externalised angle. This may not be suitable for sounds that are perceived to be either close to or within the head, but should be applicable for sounds that are well externalised. A method to conduct this converstion of ITD to angle was derived by inverting data on the ITD created by sound sources at specific angles.
[Mason et al 2004d