The satisfaction of iSonar performance was evaluated by interviewing the volunteers. The 5-point Likert-scale score was 4.13, which can be interpreted as good-excellent,
as shown in Table 2. Among the evaluation items, the volunteers were most satisfied with iSonar’s shape and size. There were two items with average Liker-scale scores of
less than 4 - tactile feedback and distance detection.Volunteers preferred a greater density of response and longer distance of obstacle detection. For further development,
this device should be put to test in different temperatures and humidity levels to assure accuracy.