<![CDATA[Abstract.The aimof this research is to develop an audio based math media.It will help blind stunentd to understand thecircumferenceandtriangle area concepts. The methodis obtained from modifyng Four D modeland data collecting proccessin this research usequestionnaires andobservation. The validation results done by computerexpert, education expert and math teacherof SMPLBclass VII-A shows that 87.91% of the criteria have been fullfiled the validityand no revision required. The next stepis implementation test forblind studentsof class VII. The media test results shows that 92.85% have been fulfilledthevalidity. It means that the media has a very valid category and no revision required. The development result ofaudio based math media is an executable software. The product of this research are 6 units audio based math media and the manual book.
Key Words:development research, audio, blind students]]>
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