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Acoustic Source generates an acoustic signal between the frequency ranges of 20 to 20000 Hz .In this paper we define a method for the localization of acoustic source using an equally spaced array of microphones placed at a defined position. The paper focuses on design and development of lab prototype with simulation using the Time Difference of Arrival (TDOA) approach. An array of four sensors embedded with the source code was developed to triangulate the position of acoustic signal source. The calculation includes specifying the two dimensional coordinates of the microphone array between the ranges of (-50, 50) m. This paper also includes separate calculations and source code for both software and hardware implementation. Using mathematical deductions error estimation between the true position and estimated source position was calculated. We used auto correlation and cross correlation algorithm to determine the Time Difference of Arrival. An error of up to 30% (29.2713% to be precise) and 0.01% (0.00973% to be precise) were calculated for three and four microphones array respectively in the simulated result. The simulation was implemented on hardware and the results were verified with respect to localization parameters obtained from the simulation software for acoustic signal source. The hardware model input with same values as of simulation had an increased recorded error up to 15 % for an array of four microphones. Efforts are being made to reduce this error by adjusting the background noise label and the sensitivities of microphones. The speed of sound throughout has been taken 340.29 m/s and is assumed constant in a medium throughout the experiment. The results of simulation and lab prototype shows some variation with respect to +0 due to difficulty in producing an ideal and sound proof system around the array and to keep the system analogous to physical atmosphere that would be available under normal circumstances.
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