After installing and configuring openAL-soft we were confident that the application would work almost anywhere, but unfortunatly as we understood, that is not the case. The sound card or the sound card drivers in Malshika's (2007ICT) lap top did not support 4 channels of audio, neither did it give good performance with openAL. Finding updated drivers to the device failed as well.
The alternative was to find a suitable sound card which could be used with the lap top. Gihan Lakmal (2007CS), had a satisfactory device: creative XFI, external usb sound card. The above testing was handled yesterday(22-3-2011).
After installing the external sound card on the lap top results were much more satisfactory. The location of the experiment was the third year lab. Since time of the real subjects at University of Sri Jayawardhanapura is precious, out intention was to perform a practice test on non blind subjects. The test subject(Vindya Dilhari 2007ICT), hadn't a faintest idea of the structure and project concepts.
The subject was requested to listen to the main interface many times(menu) (note: we could have noted down the number of replays of the interface). She repeatedly played the interface and sketched the overview visualization of the interface, she perceived. Since she drew the interface exactly as it is, we could say that sound positioning technique used in the implementation is successful, at least in technical sense. When traversing the interface objects, after using the auto playback to glimpse, she pointed out that play back should happen clockwise, to make it more natural to the user, and use of filling forms from bottom to top was criticized as well. It is most important to update the prototype to correct these issues. Overall response from the subject is positive. She agreed that positioning gives more support in remembering the interface. After assisting on the usage the subject masted the positioning and traversing with the arrow keys. She used the arrow keys to traverse across the boundary cells. This gives an implication that the environment was perceived accurately. And she inquired if the environment depicts an array of cells 3x3, which is the exact definition we had on our interface. These imply that the perception of the interface was in an accepted level.
It seemed the positioning of the center horizontal line was more biased towards the front, but it may be due to the difference of height in front and rear speaker placement. All four speakers should be in the same elevation, next time we do any testing.
After installing the external sound card on the lap top results were much more satisfactory. The location of the experiment was the third year lab. Since time of the real subjects at University of Sri Jayawardhanapura is precious, out intention was to perform a practice test on non blind subjects. The test subject(Vindya Dilhari 2007ICT), hadn't a faintest idea of the structure and project concepts.
The subject was requested to listen to the main interface many times(menu) (note: we could have noted down the number of replays of the interface). She repeatedly played the interface and sketched the overview visualization of the interface, she perceived. Since she drew the interface exactly as it is, we could say that sound positioning technique used in the implementation is successful, at least in technical sense. When traversing the interface objects, after using the auto playback to glimpse, she pointed out that play back should happen clockwise, to make it more natural to the user, and use of filling forms from bottom to top was criticized as well. It is most important to update the prototype to correct these issues. Overall response from the subject is positive. She agreed that positioning gives more support in remembering the interface. After assisting on the usage the subject masted the positioning and traversing with the arrow keys. She used the arrow keys to traverse across the boundary cells. This gives an implication that the environment was perceived accurately. And she inquired if the environment depicts an array of cells 3x3, which is the exact definition we had on our interface. These imply that the perception of the interface was in an accepted level.
It seemed the positioning of the center horizontal line was more biased towards the front, but it may be due to the difference of height in front and rear speaker placement. All four speakers should be in the same elevation, next time we do any testing.
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