Investigation of Multi Reference Point Estimation with Timbre for Effective Mobile Auditory Devices

In this study, we conducted a test with 20 sighted users to track the work described in earlier studies in an expanded scenario. As we have tried to answer whether adding multi-reference mapping of sonification to auditory graphs could improve the point estimation accuracy in nonvisual condition. We also emphasize the efficiency of the performance of multi-reference graphs using timbre to make them as efficient as mapping using a single pitch. The design of the study was different from the earlier study, who found that multi-reference mapping took a long time against single pitch mapping in auditory graphs. The results help provide empirical evidence that the multi-reference mode provides more accurate results than the single-pitch mode. The evaluation confirms that adding contexts to auditory graphs such as markers could improve the perception of auditory graphs.