Specific outcomes from the project

Display and interpretation factors

Creation of display techniques


A novel method of displaying the results of the predicted auditory source width over time and frequency has been derived. This allows the user to select the frequency and time segments for analysis in an interactive and intuative manner.


A number of methods of displaying the measured predictions of the perceived auditory source width have been developed. The most intuitive of these is a plot of the perceived location and width of the sound as an angle on the x-axis against the frequency band on the y-axis, with the loudness of each component indicated by the brightness of the plot. Variations over time are shown by animating the results to vary of time; the animation is created to vary in real time, so that the audio signal can be added to the movie file that is produced. In addition, it is possible to include a pair of 'peak-hold' lines that denote the widest points in each frequency band over time.

Whilst this display allows for a rapid and intuitive visual analysis of the results, the fact that it is animated makes it difficult to spot trends or important results that have a short duration. In view of this, a static plot was developed that can show either the perceived width, location, or combination of these as an angle on the y-axis over time on the x-axis. A secondary plot also displays an approximation of the loudness in phons of each frequency band on the y-axis over time on the x-axis. Interactive options allow the user to select the frequency bands and time segments to be displayed. For the combined plot of location and width, the loudness of each frequency band is denoted by the brightness of the plot, and the results are combined over frequency through the use of a density plot. This display allows for the detailed analysis of a large number of factors.


[To be reported]