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This essay is a study of the man-machine system in the mobile phone hands free car kit. According the relationship of man, machine, environment in the man-machine system. Studying the interactions between drivers and the mobile phone hands free car kit, the interior of cars and the mobile phone hands free car kit, drivers and the interior of cars. The methods of the study are experiment and interview to increase the effecting by each other. The first step of research is detecting the user requires and user satisfactions by questionnaire. Next is according the product desigh appraisement to make another interview questionnaire. In order to understand the opinions about the product in market by designer. After join the two results of study and product analysis. Than start to design a new prototype. This new prototype will test by user satisfaction again to prove the respects of this research. Finally, the result of the research shows that new prototype is indeed more advance in study items. At the end, this essay provide the conclusion, advises, and the specifications of new design prototype.
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