The results of this study suggest that further work with the test could be interesting. For example, other target and masker speech signals could be used and/or the test could be implemented in another type of loudspeaker setup. In addition, further validation studies need to be completed.
Target location uncertainty is included as an option in the Spatial Fixed-SNR (SFS) test. In that implementation of target location uncertainty, the loudspeaker set-up is changed such that the angular separation between the three target locations and their nearest masker is the same, as opposed to the approach followed above. This change in realisation of target location uncertainty helped to clarify that there are two different effects of presenting the target off to the side:
1. An increases in speech recognition brought about by an improvement in the SNR at the ‘better ear’ due the head’s acoustic baffle effect.
2. A decrease in speech recognition, which is probably due to an attention bias towards the front loudspeaker.