Specific outcomes from the project

Display and interpretation factors

Method to compensate for differences between stimuli


Simple IACC-based measurements are not suitable for making comparable measurements of different stimuli, as the frequency content and loudness of the stimuli also affects the width. By deriving methods to compensate for these factors as discussed above, comparable measurements are now possible.


Previously, it has not been possible to make comparable IACC-based measurements to predict the relative widths of different stimuli due to the fact that other factors also affect the perceived width. As mentioned above, two significant factors that contribute to this include the frequency content and the loudness of the stimuli, both of which can have a large effect on the perceived auditory source width. By deriving methods of compensating for these factors, as discussed above, it has made it possible to undertake comparable IACC-based measurements of differing stimuli. There are still a number of factors that need to be taken into account in order to provide a single figure output for simple comparison, such as integration of the results across frequency and time. However the advances made to the IACC-based model make comparitive measurements possible.


[Mason et al 2004a]