| Summary: | 碩士 === 國立臺北科技大學 === 創新設計研究所 === 101 === Many navigation systems have successively introduced the full voice control feature,
of which the purpose is to enable drivers to be less dependent on their sight while driving.
This study has assessed the usability of existing voice navigation systems and discovered
that full voice navigation tasks still have the following problems: (1) Drivers do not feel
comfortable talking to navigation devices, which may not be able to recognize voices
correctly; (2) during voice output, it is impossible to give voice commands; (3) during
voice playback, the voice message is gone instantly if the user has not listened carefully
and it is not possible to immediately request message repetition. All of these have caused
drivers to feel frustrated with full voice navigation control.
With less dependence on sight, hearing and touch become important sensing
pathways. Touch input must enable users to locate keys rapidly and easily so that they can
proceed with tasks. This study has developed a set of analog sticks as the input method in
response to voice prompts. The analog sticks include four key commands, ‘previous’,
‘next’, ‘OK’, and ‘back’, that replace voice commands by drivers to enable the operation
of navigation tasks with less dependence on sight.
Findings of the assessment test on usability conducted on 30 test takers reveal that
input via analog sticks performs better in Task 1 (Select Address Menu) and slightly
better in Task 2 (Select Address Menu and Select Destination). Subjective feelings of the
test takers show that (1) analog stick aided voice navigation control allows drivers to
make immediate selections (‘OK’, “skip next’) and skip undesired voice messages,
thereby reducing wait times, and even more convenient for skilled users; (2) since drivers
can easily miss voice prompts while driving, operating with analog sticks (‘previous’)
enables repeat playback of a selected single voice prompt, an important feature; (3) 83%
of the test takers are willing to buy navigation systems with analog stick aided control.
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