An android-based uncertainty digital audio representation for frequency analyzer

Abstract

The digital audio analyzer based on the smartphone is used to measure the strength of the sound frequency that is purposed in the audio field captured in the graphic bar. The fast track of frequency is to be analyzed and determined by the graphic form display. In this paper, the analog signal data captured by microphone of smartphone that is embedded operating system of android. The operating system of android is suitable for development of product to test harmony level both embedded hardware and embedded software. Feasibility errorness could be emerging in the input, filtering, arbitrary, and output processes. In this case, the good sensor and quite algorithms must have more portion to be identified and defined to get result as well. But, due to a good sensor isn't much showing in this paper. This paper shows how getting noise of digital data, glitch, can affect in the output display and which solution should be taken to counteract it by algorithm and coding. The result of processes level of digital audio is derivated by binary data from evaluating data produced by digital-to-analog converter (DAC) which is embedded in the smartphone.